Question

The average age of 30 boys is 13 years. The average of first 18 boys is 18 years. Find out the
average age of remaining 12 boys.
(a) 6 years (b) 10 years (c) 14 years (d) 16 years
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Answer 1

Answer:

d is the answer

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Answer 2

Answer:

Average age of 30 boys is 13years

sum " " " " " " is 390

Average age of 18 boys is 18

sum age of 18 boys is 324

12 boys are left

difference age 390- 324=66

average age of 12 rest boys is66÷12= 5.5year .

so 6year answer.

Step-by-step explanation:

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