MathDB
1999 AMC 8 #13

Source:

June 17, 2011

Problem Statement

The average age of the 40 members of a computer science camp is 17 years. There are 20 girls, 15 boys, and 5 adults. If the average age of the girls is 15 and the average age of the boys is 16, what is the average age of the adults?
(A) 26(B) 27(C) 28(D) 29(E) 30 \text{(A)}\ 26\qquad\text{(B)}\ 27\qquad\text{(C)}\ 28\qquad\text{(D)}\ 29\qquad\text{(E)}\ 30
Back to ProblemsView on AoPS