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 the mean monthly salary of the 11 members​

Answer 1

sum of the salaries of 10 members/10= mean

sum of 10 members salaries = 10×1445=14450---(1)

if another member joined whose salary is 1500

then

sum of 11 members salaries = (1)+1500=15950----(2)

new mean = (2)/11

=15950/11

=Rs1450

Answer 2

AnswEr:

Here,

$\tt n = 10 \\ \\ \tt \bar x = 1445$

So, total monthly wages of 10 persons Rs = 14450.

Monthly salary of one person who joined the group is Rs. 1500

______________________________

$\therefore$ Total monthly wages of 11 persons = Rs. 14450 + Rs.1500 = Rs. 15950

• So, average monthly salary to 11 persons :

$\tt \: \frac{total \: monthly \: wages}{11} \\ \\ = \tt \cancel\frac{15950}{11} = rs.1450$