Question

The mean mass of the 11 players in a football team is 80.3kg. The mean mass of the team plus a substitute is 81.2 kg. Calculate the mass of the substitute.

Answer 1

Given ,
Mean mass of 11 players = 80.3 kg

Mean mass of 11 players and the substitute = 81.2 kg

So , Total mass of 11 players = (80.3*11) kg = 883.3 kg

Total mass of 11 players and the substitute = (81.2*12) kg = 974.4 kg

So , Mass of the substitute = (974.4-883.3) kg
= 91.1 kg ......

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