the average weight of 40 members of a society is 47.5kg. If one of the member leaves the society the weight decreases by 500g.What is the weight of outgoing member?
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The average weight of 40 members = 47.5kg
The total weight of 40 members = 47.5 × 40 = 1900
One member leaves so remaining = 40 - 1 = 39 members
The average weight of 39 members = 47.5 - 500 ÷ 1000(To convert grams into kg) = 47kg
The total weight of 39 members = 47 × 39 =1833
∴The weight of the outgoing member = 1900 - 1833 =67kg.
The ans: 67kg
The average weight of 40 members = 47.5kg
The total weight of 40 members = 47.5 × 40 = 1900
One member leaves so remaining = 40 - 1 = 39 members
The average weight of 39 members = 47.5 - 500 ÷ 1000(To convert grams into kg) = 47kg
The total weight of 39 members = 47 × 39 =1833
∴The weight of the outgoing member = 1900 - 1833 =67kg.
The ans: 67kg
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