A) 2000
B) 2500
C) 800
D) 400
Correct Answer: C
Solution :
[c] Number of boys\[=\frac{4}{5}\times 50=40\] Number of girls\[=\frac{1}{5}\times 50=10\] Average age of boys=\[2\times 20=40\] Total ages of the boys=\[40\times 20=800\]You need to login to perform this action.
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