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The mean weight of 6 boys in a group is 48kg. The individual weights o 5 of them are 50kg, 45kg, 50kg, 42kg and 40kg. Find the weight of the sixth boy.
Given is that, mean weight of 6 boys = 48 kg
Mean is given by,
Where, ∑x = sum of all observations
& n = total number of observations
Here, n = 6 and mean = 48.
Let the weight of 6th boy be x.
⇒ 227 + x = 48 × 6
⇒ 227 + x = 288
⇒ x = 288 – 227
⇒ x = 61
Thus, weight of the sixth boy is 61 kg.
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