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QWhat is the mean of the first 40 natural numbers?

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  • A 20.5 ✔ ✖
  • B 19.5 ✔ ✖
  • C 15.6 ✔ ✖
  • D 17.4 ✔ ✖
Correct Answer

Explanation

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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