Question

The mean of 50 observations was 250. Later it was found out that the number 152 was wrongly copied
as 102 for the computation of mean. Find the correct mean.​

Answer 1

Answer:

251

Explanation:

Let The Total Sum of 50 Observations be x.

Now Given Mean of 50 observations=250.

Now Mean =sum of total Observations/ Total no: of observation's

→250=x/50

→x=250×50=12,500

So the sum Of observations=12500.

Now Given.152 was Wrongly Copied as 102.

So 50 must be added to 12500 to correct its Fault.

So The Correct sum =12550.

So The Correct Mean=12550/50=251.

So 251 is the answer you are looking for