Question

the mean salary of 20 worker is 10250 if the salary of office superintendent is added the mean will be increased by rupees 750 find the salary of the office superintendent

Answer 1

Answer:

Step-by-step explanation:

(X1 + x2 +.......+ x20) ÷ 20 =10250

X1 + x2 +..... x20 = 205000

If salary of office superintendent is added

(X1 + x2 +......+x21) ÷ 21 = 10250 + 750

= 11000

X1 + x2+...... +x21 = 231000

So 231000 - 205000 = 26000

Answer 2

mean salary = 10250
no. of workers = 20
if superintendent salary added
mean salary = 11000
mean salary = total salary/ no. of workers
10250 = total salary/20
total salary = 205000

if superintendent salary added
mean salary = total salary/ no. of workers
11000 = total salary/21
total salary = 231000

hence,
superintendent salary = 231000-205000
= 26000