Question

the mean of first 'n' natural numbers is 6.then n?=

Answer 1

Answer:

11

Step-by-step explanation:

mean of n natural numbers =  sum of n natural numbers / n

sum of n  natural numbers =  n(n+1)/2

Given mean=6

∴ n(n+1)/2n =6

n²+n =12n

n²-11n =0

n(n-11)=0

∴n=11

∴ n(n+1)/2n = 6

Answer 2

Step-by-step explanation:

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