the average age of an adult class is 40 years. 12 new students with an average

Question

the average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class. therefore decreasing the average by 4 year. what was the original strength of class ?

Options:

A . 12

B . 22

C . 33

D . 44

Answer: Option A
Explanation :

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