Math, asked by kumardeepak258369, 7 months ago

The mean of 40 observation was 160. It was detected on rechecking that the value of 165 was wrongly copied as 125 for computation of mean . Find the correct mean .

Answers

Answered by dgarg9624

1

Step-by-step explanation:

since the value of 165 was copied as 125 there was a decrease in the sum of the numbers by 40

now

sum of the numbers with 125

160x 40 = 6400

sum of numbers without 125

6400-125 = 6275.

correct sum of the numbers

6275+165 = 6440

correct mean

6440/40 = 161

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