ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    What is the average of the squares of the first 11 natural

    numbers?
    A 42 Correct Answer Incorrect Answer
    B 44 Correct Answer Incorrect Answer
    C 46 Correct Answer Incorrect Answer
    D 48 Correct Answer Incorrect Answer

    Solution

    Sum of squares of first 'n' natural numbers = n ├Ч (n + 1) ├Ч (2n + 1) ├╖ 6
    So, average = n ├Ч (n + 1) ├Ч (2n + 1) ├╖ 6n = (n + 1) ├Ч (2n + 1) ├╖ 6
    = (11 + 1) ├Ч (2 ├Ч 11 + 1) ├╖ 6
    = 12 ├Ч 23 ├╖ 6
    = 46

    Practice Next
    More Average Questions
    ask-question