Math, asked by s1854shrestha12199, 8 hours 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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