In a school with 600 students, the average age of the boys is 12 years and that

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In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average of the school is 11 years 9 months, then the average the number of girls in the school is :

Options:

A . 150

B . 250

C . 350

D . 450

Answer: Option A

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