Question

Average age of a group of 50 students is 60 yr. The average age becomes 62 yr. if 5 other students are also joined the group. The average age of new students is?

Answer 1

Step-by-step explanation:

case -1:

N=50

A=60

A=S/N

S=AN

S=60(50)

S=3000

CASE-2:

N=55

A=62

S=55(62)

S=3410

sum of ages of 5 other students is 3410-3000

= 410

now s= 410

n=5

average age of 5 students= 410/5=82