Calculating Probability
ISEE Lower Level Quantitative Reasoning · Flashcards
ISEE LOWER LEVEL QUANTITATIVE REASONING · FLASHCARDS
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QUESTION
A class has
18
18
18
students:
10
10
10
wear glasses. What is
P
(
glasses
)
P(\text{glasses})
P
(
glasses
)
in simplest form?
QUESTION
What is the probability of choosing a blue marble if there are
3
3
3
red and
7
7
7
blue marbles?
QUESTION
A box has
6
6
6
red,
2
2
2
blue, and
4
4
4
white balls. What is
P
(
not white
)
P(\text{not white})
P
(
not white
)
?
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ANSWER
2
3
\frac{2}{3}
3
2
. This is the complement of drawing a white ball, calculated as 1 minus the probability of white.
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