the average age of 30 students in a class is 12 years. the average age of a gr

Question

the average age of 30 students in a class is 12 years. the average age of a group of 5 of the students is 10 years and that of another group of 5 them is 14 years. the average age of the remaining stu

Options:

A . 10

B . 12

C . 14

D . 16

Answer: Option B
Explanation :

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