Question

The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average, one number namely 36 was wrongly read as 26. The correct average is

Answer 1

Average of ten numbers = (sum of 10 numbers)/10

15 = (sum of 10 numbers)/10

15*10 = sum of 10 numbers

150 =sum  of 10 numbers

Later on, one number was written wrong as 26, 

So, Now,

correct sum of numbers is  = 150-26+36

                                           = 150 + 10

                                           = 160

Now,

Correct Average = (sum of 10 numbers)/10

Correct average = 160/10

Correct Average = 16