Math, asked by biralmp, 1 month ago

the mean of 10 observation was calculated as 40 on rechecking it was detected that the number 45 was incorrectly copied as 15. Find the correct mean .​

Answers

Answered by shindesarswati2110
6

Solution :

The mean of 10 observations = 40

The sum of 10 observations = 40×10

= 400

If the observation 45 was wrongly

copied as 15 then

correct observation = 45 - 15

= 30

Sum of correct observations = 400+30

= 430

Correct mean = 430/10

= 43

Therefore ,

Correct mean = 43

Similar questions