Question

The average of 5 numbers is 50. The number 40 was incorrectly written as 60 while calculating. Find the correct average.

• A. 36
• B. 56
• C. 46
• D. 66

Answer 1

The correct option is C 46

Given, average=50
$\frac{Sumofallnumbers}{5}$ =50
$⟹$Sum of all numbers = 50$\times$5 = 250
But, 40 was incorrectly written as 60 so the correct sum = (Sum of all numbers) - 60+ 40
=250- 60+ 40 = 230
$\therefore$Correct average = $\frac{230}{5}$= 46.