Question

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 mean monthly salary of 11 members of the group.

• A. Rs.$1550$
• B. Rs.$1950$
• C. Rs.$1050$
• D. Rs.$1450$

Answer 1

The correct option is D Rs.$1450$

Mean monthly salary of $10$ members $=Rs.1445$

New member salary $=Rs.1500$

New mean$=\frac{1445\times 10+1500}{10+1}$

$=\frac{15950}{11}$

$=Rs.1450$.