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You are here: Home / Quant Questions / Arithmetic / GMAT Descriptive Statistics : Averages

GMAT Descriptive Statistics : Averages

January 23, 2012 By K S Baskar Leave a Comment

Question
If the average of 5 positive integers is 40 and the difference between the largest and the smallest of these 5 numbers is 10, what is the maximum value possible for the largest of these 5 integers?
A. 50
B. 52
C. 49
D. 48
E. 44
Correct Answer : Choice D. 48
Explanation

The average of 5 positive integers is 40. i.e., the sum of these integers = 5*40 = 200
 

Let the least of these 5 numbers be x.
Then the largest of these 5 numbers will be x + 10.
 

If we have to maximize the largest of these numbers, we have to minimize all the other numbers.
 

That is 4 of these numbers are all at the least value possible = x.
So, x + x + x + x + x + 10 = 200
Or x = 38.
So, the largest of these 5 integers is 48.

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Filed Under: Arithmetic Tagged With: GMAT Descriptive Statistics, GMAT Math, GMAT Mean, GMAT Problem Solving, GMAT Problem Solving Practice

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