How to find mean - SSAT Middle Level Quantitative
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In a group of 4 books, the average number of pages is is 10. Juan adds a book with 20 pages to the group. What is the new average number of pages?
In a group of 4 books, the average number of pages is is 10. Juan adds a book with 20 pages to the group. What is the new average number of pages?
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If the average of 4 books was 10, then the total number of pages was 
. Adding in the 20 new pages, but now dividing by 5 you get 
.
If the average of 4 books was 10, then the total number of pages was
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On the first four exams, Charley scored 92, 88, 76, and 74. Charley wants to have a test average of 85%. What must Charley score on the fifth exam to average 85%?
On the first four exams, Charley scored 92, 88, 76, and 74. Charley wants to have a test average of 85%. What must Charley score on the fifth exam to average 85%?
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The summation of the first four exams equals 330. Using the equation for average, Charley needs to get a 95 on the last exam.
The summation of the first four exams equals 330. Using the equation for average, Charley needs to get a 95 on the last exam.
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Jason has taken five tests this quarter in school. What is his average if his grades for the five tests are 81, 78, 91, 88 and 93?
Jason has taken five tests this quarter in school. What is his average if his grades for the five tests are 81, 78, 91, 88 and 93?
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First add up all of the scores:
Then, divide that number by the total number of tests that Jason took:
Answer: Jason's average is 86.2
First add up all of the scores:
Then, divide that number by the total number of tests that Jason took:
Answer: Jason's average is 86.2
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Olivia is considering buying a new car. She is looking at three different cars. The price for the three cars is 
, 
and 
, respectively. What is the average price of a car Olivia is considering?
Olivia is considering buying a new car. She is looking at three different cars. The price for the three cars is
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First add up the prices of each of the cars:
Then divide that number by the total number of cars:
Answer: The average price of a car Olivia is considering is 
First add up the prices of each of the cars:
Then divide that number by the total number of cars:
Answer: The average price of a car Olivia is considering is
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Find the mean of this set of numbers:
Find the mean of this set of numbers:
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First, add the three numbers:
Then, divide by the amount of numbers in the set:
The answer is 
First, add the three numbers:
Then, divide by the amount of numbers in the set:
The answer is
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Britney is shopping for shorts. What is the average price of the shorts Britney is considering buying if their prices are $7.99, $10.99, $12.99 and $9.99?
Britney is shopping for shorts. What is the average price of the shorts Britney is considering buying if their prices are $7.99, $10.99, $12.99 and $9.99?
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First, add the the prices of the shorts:
Then, divide that amount by the total number of shorts:
The answer is 
.
First, add the the prices of the shorts:
Then, divide that amount by the total number of shorts:
The answer is
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Find the mean of this set of numbers:
54, 41, 99, 120, 66.
Find the mean of this set of numbers:
54, 41, 99, 120, 66.
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Firrst, add the numbers:
Then, divide by the amount of numbers in the set:
Answer: The mean is 76.
Firrst, add the numbers:
Then, divide by the amount of numbers in the set:
Answer: The mean is 76.
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Find the mean of this set of numbers:
Find the mean of this set of numbers:
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First add all the numbers; then, divide by the amount of numbers in the set:
Answer: The mean is 
.
First add all the numbers; then, divide by the amount of numbers in the set:
Answer: The mean is
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Find the mean of this set of numbers:
Find the mean of this set of numbers:
Tap to reveal answer
First, add the numbers in the set:
Then divide by the amount of numbers in the set:
Answer: The mean is 
.
First, add the numbers in the set:
Then divide by the amount of numbers in the set:
Answer: The mean is
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Find the average of this set of numbers:
521, 834, 754, 902, 899
Find the average of this set of numbers:
521, 834, 754, 902, 899
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First, add all the numbers in this set:
Divide, 3910 by the total amount of numbers in the set:
Answer: The average is 782.
First, add all the numbers in this set:
Divide, 3910 by the total amount of numbers in the set:
Answer: The average is 782.
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Find the mean in this set of numbers:
5570, 4886, 5226, 4120, 6561, 4120, 6008
Find the mean in this set of numbers:
5570, 4886, 5226, 4120, 6561, 4120, 6008
Tap to reveal answer
First, add all the numbers in this set:
Then, divide that amount by the total number in the set:
Answer: The mean is 5213.
First, add all the numbers in this set:
Then, divide that amount by the total number in the set:
Answer: The mean is 5213.
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Adrienne is trying on dresses for prom. The dresses she likes each cost 
, 
, 
and 
, respectively. What is the average dress price that Adrienne is considering?
Adrienne is trying on dresses for prom. The dresses she likes each cost
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First, add up all of the dress prices:
Then, divide by the number of dresses:
Answer: The average dress price is 
First, add up all of the dress prices:
Then, divide by the number of dresses:
Answer: The average dress price is
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It rained 2 inches on Saturday, 4 inches on Sunday, 3, inches on Monday, and 3 inches on Tuesday. On average, how many inches did it rain each day?
It rained 2 inches on Saturday, 4 inches on Sunday, 3, inches on Monday, and 3 inches on Tuesday. On average, how many inches did it rain each day?
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Find the total inches of rain first:
Then, divide by the number of days:
.
Therefore, on average, it rained 3 inches a day.
Find the total inches of rain first:
Then, divide by the number of days:
Therefore, on average, it rained 3 inches a day.
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Find the average of this set of numbers:
2521, 2512, 2525, 2552, 2551, 2525, 2517
Find the average of this set of numbers:
2521, 2512, 2525, 2552, 2551, 2525, 2517
Tap to reveal answer
First, add all the numbers in this set:
Then, divide by the amount of numbers in the set:
Answer: The average is 
First, add all the numbers in this set:
Then, divide by the amount of numbers in the set:
Answer: The average is
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In my town, a gallon of milk costs $3.21, $3.39 and $3.51 in three different stores. What is the average price of a gallon of milk in my town?
In my town, a gallon of milk costs $3.21, $3.39 and $3.51 in three different stores. What is the average price of a gallon of milk in my town?
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First, add all of the prices:
Then divide, that amount by 3 (number of stores in town):
Answer: The average price of a gallon of milk is 
First, add all of the prices:
Then divide, that amount by 3 (number of stores in town):
Answer: The average price of a gallon of milk is
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In my town, a gallon of gas costs $3.47, $3.79 and $3.60 in three different stations. What is the average price of a gallon of gas in my town?
In my town, a gallon of gas costs $3.47, $3.79 and $3.60 in three different stations. What is the average price of a gallon of gas in my town?
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First, add all of the prices:
Then, divide by 3 (total number of stations)
Answer: The average price for a gallon of gas in my town is 
First, add all of the prices:
Then, divide by 3 (total number of stations)
Answer: The average price for a gallon of gas in my town is
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Find the mean in this set of numbers:
3343, 4434, 4334, 3343, 4343, 3434, 3334
Find the mean in this set of numbers:
3343, 4434, 4334, 3343, 4343, 3434, 3334
Tap to reveal answer
First, add all the numbers in this set:
Then, divide by 7 (the amount of numbers in this set):
Answer: The mean is 3795
First, add all the numbers in this set:
Then, divide by 7 (the amount of numbers in this set):
Answer: The mean is 3795
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While shopping for a couch, Mila found four she really liked. Each cost 
, 
, 
and 
. What is the average price of a couch Mila is considering?
While shopping for a couch, Mila found four she really liked. Each cost 
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First, add all the prices:
Then, divide by 4 (the number of couches):
Answer: The average price of a couch Mila is considering is $612.
First, add all the prices:
Then, divide by 4 (the number of couches):
Answer: The average price of a couch Mila is considering is $612.
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Elizabeth went food shopping today. She spent $32.78, $21.63 and $19.39 at each supermarket. How much did Elizabeth spend, on average, at each supermarket?
Elizabeth went food shopping today. She spent $32.78, $21.63 and $19.39 at each supermarket. How much did Elizabeth spend, on average, at each supermarket?
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First, add the amounts Elizabeth spent at each supermarket:
Then divide by 3 (the number of supermarkets she went to):
Answer: On average, Elizabeth spent $24.60 at each supermarket.
First, add the amounts Elizabeth spent at each supermarket:
Then divide by 3 (the number of supermarkets she went to):
Answer: On average, Elizabeth spent $24.60 at each supermarket.
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Felicia ran three races as a member of the track team. The races were 1000 meters, 2000 meters and 1800 meters, respectively. What was the average distance of the 3 races?
Felicia ran three races as a member of the track team. The races were 1000 meters, 2000 meters and 1800 meters, respectively. What was the average distance of the 3 races?
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First, add the lengths of the races:
Then divide by the number of races:
Answer: The average race was 1600 meters.
First, add the lengths of the races:
Then divide by the number of races:
Answer: The average race was 1600 meters.
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