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प्रश्न
The mean of the square of first 11 natural numbers is
विकल्प
26
46
48
52
उत्तर
46
Explanation;
Hint:
= `(1^2 + 2^2 + 3^2 + 4^2 + 5^2 + 6^2 + 7^2 + 8^2 + 9^2 + 10^2 + 11^2)/11`
= `(1 + 4+ 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100 + 121)/11`
= `506/11`
= 46
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