Math, asked by rhyh0are3sburabh, 1 year ago

the mean of monthly salary of the 12 employees of a firm is Rs 1450 .if one more person joins the firm who gets Rs 1600 per month ,what will be the mean monthly salary now

Answers

Answered by SARDARshubham
3
Let the salaries of 12 employees be
x1,x2,x3.....x12

Mean = (x1+x2+...+x12)/12

1450 = (x1+...+x12)/12

x1+x2+....+x12 = 17400

New mean
= (x1+x2+....+x12+1600)/13
= (17400+1600)/13
= 19000/13
= 1461.53
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Answered by Anonymous
5
Mean = Sum of all observations / No: of observations


∴ Sum of all observations = No: of observations × Mean

No: of observations = 12
Mean = 1450

Sum of all observations = 12 × 1450 = 17400


⇒If one more person is added ,
No: of observations = 13
Sum of all observation = 17400 + 1600 = 19000

⇒ New mean = Sum of all observations / No: of observations
= 19000 ÷ 13 = 1461.53846



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