# RS Aggarwal Solutions Class 9 Mathematics Solutions for Mean Median And Mode Of Ungrouped Data Exercise 18A in Chapter 18 - Mean Median And Mode Of Ungrouped Data

Question 6 Mean Median And Mode Of Ungrouped Data Exercise 18A

The mean weight of 6 boys in a group is 48kg. The individual weights of five of them are 51kg, 45kg,

49kg, 46kg and 44kg. Find the weight of the sixth boy.

It is given that

Mean weight of 6 boys = 48kg

So we get

Mean weight = sum of the weight of 6 boys/6 = 48

We know that

Sum of weight of six boys = 48 (6) = 288kg

So the sum of weight of 5 boys = (51 + 45 + 49 + 46 + 44) = 235kg

We get

Weight of sixth boy = sum of weight of six boys – sum of weight of 5 boys

By substituting the values

Weight of sixth boy = 288 – 235

By subtraction

Weight of sixth boy = 53kg

Therefore, the weight of sixth boy is 53 kg

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