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DSQ: Calculating arithmetic mean Practice Test

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Q1

How much greater is the average of the integers from 500 to 700 than the average of the integers from 60 to 90?

Choose the answer that best describes sufficient data to solve the problem.

3 numbers are given in increasing order. The arithemetic mean of the first two is 5 less than the arithmetic mean of all three. The sum of the first two numbers is equal to the arithmetic mean of the last two. What is the first number?

I. The second number is given.

II. The arithmetic mean of the first and third numbers is given.

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