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 ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, the age of the younger new comer is |
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a) |
20 years |
b) |
15 years |
c) |
18 years |
d) |
16 years |

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 ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, the age of the younger new comer is |
|||||||

a) |
20 years |
b) |
15 years |
c) |
18 years |
d) |
16 years |

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