18000 (-1D) of these9. The mean of the following data 1222, 32....... – InterviewSolution

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1.	18000 (-1D) of these9. The mean of the following data 1222, 32........ n?is -(D)39. FF(n +1) (2n+1)n(n-1)(2n +1)(AM6(B)(A)6on(n + 1/21 - n(n â 1/20 - 1)(C)40.9. A fair die is thrown once. The probability of getting aless than 5 is10
Answer» sum of squares of first n natural numbers = n(n + 1)(2n + 1)/6mean = (n + 1)(2n + 1)/6

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