Question

Arithmetic mean of 5 numbers in a series is 16. If 2 numbers (mean numbers) are removed from this series and replaced with 20 and 24, what will be the new mean?

Answer 1

Arithmetic Mean of the 5 numbers = 16

Sum of the numbers = 16 $\times$ 5 = 80

Removing 2 numbers we get : 80 - 32 = 48

Adding 20 and 24 to 48, we get: 48 + 44 = 92

New mean of these 5 numbers will be: $\frac{92}{5}$ = 18.4