Question

The mean age of 7 boys is 12yrs. What is the total age of the boys?​
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Answer 1

total age = 84 years

Explanation:

mean is calculated as

mean =
`(total)/(count)`

here count = 7 and mean = 12 , then

`(total)/(7)` = 12 ( multiply both sides by 7 )

total = 7 × 12 = 84 years