The average age of boys in the class is twice the number of girls in the class. If the ratio of boys to girls in a class of 36 is 5:1, what is the total age (in years) of the boys in the class?
A
380
B
342
C
372
D
360
Correct Option:
D
Explanation
Boys:girls = 5:1 and total students = 36, so boys = 30 and girls = 6. The boys' average age is twice the number of girls = 2×6=12. Thus, the total age of the boys = 30×12=360.
