Question

he average of 50 numbers is 20. If two numbers 37 and 43 are discarded, find the average of the remaining numbers.
$\left[3Marks\right]$

Answer 1

Average of 50 numbers = 20

Sum of 50 numbers = 20 x 50 = 1000
$\left[1Mark\right]$

Sum of discarded numbers = 37 + 43 = 80

Sum of remaining numbers = 1000 – 80 = 920
$\left[1Mark\right]$

Now, total remaining numbers = 50 – 2 = 48

Average of remaining numbers = 920/48 = 19.17
$\left[1Mark\right]$