Jeff Miller

GMAT OFFICIAL GUIDE PS – A total of 22 men and 26 women were at a party…

A total of 22 men and 26 women were at a party…

Solution:

1) Since there are 48 people (22 men and 26 women) and the average age of all of them is 35, the total ages of all the people at the party is 48(35).

2) Since there are 22 men and their average age is 38, the sum of all the men’s ages is 22(38).

3) There are 26 women; letting their average age be x, the sum of all the women’s ages is 26x.

Since the sum of the ages of all 48 people must be equal to the sum of the ages of the 22 men plus the sum of the ages of the 26 women, we have

48(35) = 22(38) + 26x

1680 = 836 + 26x

26x = 844

x = 844/26

x = 32 12/26 ≈ 32.5

Answer: D 

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