The average weight of 39 students is 30kg. By the admission of a new student, the average comes down to 8 kg. Find the weight of the new student.

The average weight of 39 students is 30kg. By the admission of a new student, the average comes down to 8 kg. Find the weight of the new student.

A 22kg

B 22.6kg

C 31kg

D 29.8kg

Solution

Correct Answer: Option A

30*39 = 1170

29.8*40 = 1192

Weight of new student = 1192 - 1170

= 22