Average weight of four boys is 24 kg. If the weight of another boy is also included, their average weight becomes 24.6 kg. Find the weight of the fifth boy?
Answer: 27 kg
Explanation
Initially, the total weight of four boys is:
Total weight = Average weight * Number of boys
= 24 * 4
= 96 kg
When the fifth boy's weight is included, the new total weight is:
New total weight = New average weight * New number of boys
= 24.6 * 5
= 123 kg
The weight of the fifth boy is:
Weight of fifth boy = New total weight - Initial total weight
= 123 - 96
= 27 kg
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