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The average age of 30 boys in a class is...

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came In his place whose age differ by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer Is :

A

20 years

B

15 years

C

10 years

D

8 years

Text Solution

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The correct Answer is:
B
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The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in this place whose age differ by 5 years. If the average age of all boys now in the class becomes 15 years, the age of the younger newcomer is :

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