Correct Answer - Option 4 : 50
Given:
The given numbers are 1, 3, 5, 7, ...., 99.
Formula used:
Average = Sum of observations/total number of observations
Sum of n odd numbers = n2
Total number of odd numbers = [(last number - first number)/2] + 1
Calculation:
Total number of odd numbers = [(99 - 1)/2] + 1
⇒ 49 + 1
⇒ 50
Sum of 50 odd numbers = 502
Average = 502/50
⇒ 50
∴ The average all odd numbers bellow 100 is 50.