Math, asked by s1854shrestha12199, 23 days ago

The mean of 10 observations was calculated as 40. It was detected on rechecking that the value of 40 was wrongly copied as 10. Find the correct mean.

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Answers

Answered by AtikRehan786
0

Step-by-step explanation:

=》Mean = (Sum of all observations)/(Number of observations) 

=》or, 40 = (Sum of all observations)/10 

=》So, sum of all observations = 400 

=》But this is incorrect sum, since one observation was copied wrongly. 

=》 So, correct sum = Incorrect sum – Incorrect observation + correct observation 

=》400 – 15 + 45 

=》430 

=》 Correct Mean = Correct Sum/ Number of observations

=》 430/10 

=》43

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Answered by sohinibanerjee2205
0

Step-by-step explanation:

Here's the solution.

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