Question

The average weight of 15 students in a class is increased by 1.5 kg when one of the students waiting 40 kg is replaced by a new student what is the weight of the new student

Answer 1

Step-by-step explanation:

average weight of 15 students=X

total weight of students=15X

A+40=15X

A=15X-40

New average weight of 15 students=X+1.5

New total weight of students=15(X+1.5)

A+B=15X+22.5

15X-40+B=15X+22.5

B-40=22.5

B=62.5