Question

the Arithmetic mean of 15 values was calculated as 20.2 later it was found that two values 23 and 35 were wrongly taken as 32 and 53. Find the correct mean
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Answer 1

Answer:

11•99

Step-by-step explanation:

as we know that

20•5=(32+15(53-32))/(n+1)

this is mean between 32 and 53

now for correct A.M

A15=(23+15(35-23))/(n+1) now after solving both we get correct Arithmetic mean

=11•99