- A 20.5
- B 19.5
- C 15.6
- D 17.4
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Answer:
A
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To find the average of the first 40 natural numbers,
the sum of these numbers is calculated using the formula
"sum of first n natural numbers=n(n+1)/2",
which yields a sum of 820.
The average is then calculated by dividing this sum by the total number of numbers,
resulting in an average of 20.5
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