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9 March, 17:28

The mean of 8 men's weight in a sport team is 94kgs. when a subtitute is included, the mean of the 9 men's weight is 92kgs. the weight of the subtitute is ... kgs

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  1. 9 March, 17:36
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    If 8 men each weigh 94 kg on average, then the whole team together weighs 752Kg (8 x 94).

    if there are now 9 men each weighing an average of 92 Kg then the total team weighs 828Kg (9 x 92)

    so to find the weight of the substitute you have to subtract the first answer from the second one, so ...

    828-752 = 76Kg
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