1. A man had 7 children. When their average age was 12 years, a child aged 6 years died. The average age of remaining six children is
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By: anil on 05 May 2019 01.54 am
initially the number of children =7 Average age = 12 years So using average = $$frac{sum}{Number of elements} $$ Sum of ages of 7 children = 12 x 7 = 84 years Now it is given that a child of age 6 years is dead and hence new total age = 84- 6 = 78 Number of persons after the death of 6 year old child = 6 New average = $$frac {78}{6} $$ = 13
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