No.44
Q.44. If mean of 1, 2, 3, ...., n is 16 n 11 , then value of n is _______
(A) 11
(B) 10
(C) 12
(D) 15

Dear Student,

The sum of n natural numbers Sn =nn+12Mean = Sum of numbersTotal numbersGiven: Mean= 16n11So, nn+12n=16n11nn+12×1n = 16n1111n+1=32n11n+11=32n32n-11n=1121n=11n=1121Hence the given options are not correct as per the question.

Regards

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