The mean weight of a group of seven boys is 56 kgs. The individual weights (in kg) of six of them are 52, 57, 55, 60, 59 and 55. Find the weight of the seventh boy. [4 MARKS]

Open in App

Solution

Concept: 2 Marks
Application: 2 Marks

Mean weight of 7 boys = 56 kg.

Total weight of 7 boys $= (56 \times 7) k g = 392 k g$

Total weight of 6 boys = (52 + 57 + 55 + 60 + 59 + 55) kg

= 338 kg

Weight of the 7th boy

=(total weight of 7 boys) - (total weight of 6 boys)

=(392 - 338) kg = 54 kg

Hence, the weight of the seventh boy is 54 kg.

Suggest Corrections

Similar questions

The mean weight of a group of seven boys is 56 kg. The individual weights (in kg) of six of them are 52, 57, 55, 60, 59 and 55. Find the weight of the seventh boy.

Q. The mean weight per student in a group of seven students is 55 kg if the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then weight of the seventh student is

The mean weight of a group of six boys is 64 kg. The individual weights (in kg) of five of them are 52, 57, 55, 60 and 68. Find the weight of the sixth boy.

The mean weight of six boys in a group is 48 kg. The individual weights of five of them are 51 kg, 45 kg, 49 kg, 46 kg and 44 kg. The weight of the 6th boy is
(a) 52 kg
(b) 52.8 kg
(c) 53 kg
(d) 47 kg

Join BYJU'S Learning Program