Math, asked by yukeshgoyal23, 9 months ago

The mean of 40 observations was 170. It was detected
that the value of 160 was wrongly copied as 120.
Find the correct mean.

Answers

Answered by sangeethadhanapal143

1

Answer:

The mean = sum of all ÷ number of all observation

160 = sum of all ÷ 40

160×40 = 6400

now ATP

6400 - 125 + 165 = 6440÷4

=161

so the correct mean = 161

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