The mean monthly salary of 10 members of a group is Rs. 1445, one more member whose monthly salary is Rs. 1500 has joined the group. Find the mean monthly salary of 11 members of the group.

Explanation

Mean salary of `10` members`=Rs.1445`.
Mean`=(sumf_i\x_i)/(sumf_i)`
`1445=(sumf_i\x_i)/10`
`sumf_i\x_i=1445xx10=Rs.14450`
If one more member whose monthly salary is `Rs.1500` has joined the group, then
Mean`=(14450+1500)/11`
Mean`=15950/11=Rs.1450`
Hecne, the new mean after joining a new member will be `Rs.1450`.