Question

A company has 800 managers .The mean salary paid to them is 3850.Later on it was found that the salary of two managers were wrongly taken as 2870 and 3645 instead o 2780 and 3654 .Find the correct mean

Answer 1

the sum of all the salary=3850*800=3080000

sum of the wrong salary=2870+3645

=6515

the sum of actual salary=2780+3654=6434

it means that we were adding a wrong no but the correct no difference is=6515-6434=81

so the actual sum of the salary was=3080000-81=3079919

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so correct mean=3079919/800=3849.89875

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. hope it helped you.

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please mark it as brainliest.

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.I spent a lot of time in writing the answer

Answer 2

Answer:

Corrected Mean= 3849.89

Explanation:

Incorrect ∑x= 3850 x 800= 30,80,000

Correct ∑x= (Incorrect ∑x- Incorrect value+ Correct Value)/ N

                 = 30,80,000- (2870+ 3645) + (2780+ 3654)

                 = $\frac{30,80,000- 6515+ 6434}{800}$

                 = 3849.89

Hope it helps :)