Multiple Choice Questions on Find the average of the first 90 natural numbers ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

Find the average of the first 90 natural numbers ........

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    Find the average of the first 90 natural numbers?

    50.5

    Incorrect Answer

    45.5

    Correct Answer

    35.5

    Incorrect Answer

    40.5

    Incorrect Answer
    Explanation:

    Sum of first n natural numbers = [n(n+1)]/2 
    So, sum of first 65 natural numbers = (90 x 91 )/2 
    = 4095
    Required average = 4095/90 = 45.5

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