atanty Boys Have welghts tore ttart tueThe mean of 50 observations was

1.	atanty Boys Have welghts tore ttart tueThe mean of 50 observations was 250. Later it was found out that the number 152 was wrongly copiedas 102 for the computation of mean. Find the correct mean.3.
Answer» Mean = sum of observations /number of observations 250 = sum of observations /50 Sum of observations = 250*50= 12500 As given number 152 wrongly copied as 102 Then, Correct sum of observations = 12500 + 152 - 102= 12500 + 50 = 12550 Therefore, Correct mean= 12550/50= 251

atanty Boys Have welghts tore ttart tueThe mean of 50 observations was 250. Later it was found out that the number 152 was wrongly copiedas 102 for the computation of mean. Find the correct mean.3.

Answer»

Mean = sum of observations /number of observations

250 = sum of observations /50

Sum of observations = 250*50= 12500

As given number 152 wrongly copied as 102 Then, Correct sum of observations = 12500 + 152 - 102= 12500 + 50 = 12550

Therefore, Correct mean= 12550/50= 251