What is the average of odd numbers from 1 to 40?
Solution
Correct Answer: Option A
sum of odd numbers from 1 to 40= 1 + 3 + 5 + ... + 39
= 20 (1 + 39)/2
= 20 × 40/2
= 400
Average = 400/20
= 20
= 20 (1 + 39)/2
= 20 × 40/2
= 400
Average = 400/20
= 20
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