The mean weight of 6 boys in a group is 48 kg. The individual weights of 5 of them are 50 kg, 45 kg, 49 kg, 46 kg and 44 kg. Find the weight of the sixth boy. - IQ786

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The mean weight of 6 boys in a group is 48 kg. The individual weights of 5 of them are 50 kg, 45 kg, 49 kg, 46 kg and 44 kg. Find the weight of the sixth boy.

The mean weight of 6 boys in a group is 48 kg. The individual weights of 5 of them are 50 kg, 45 kg, 49 kg, 46 kg and 44 kg. Find the weight of the sixth boy.

51 kg

81 kg

71 kg

61 kg

Explanation

Mean weight of $6$ boys $= 48$ kg.
Let the weight of the $6$ th boy be a kg.
$\frac{5 0 + 4 5 + 5 0 + 4 2 + 4 0 + a}{6} = 48$
$= > 227 + a = 288 = > a = 61$
weight of the $6$ th boy $= 61$ kg.