Question

If the mean of first n natural numbers is 5n/9 , find the value of n

Answer 1

Step-by-step explanation:

given that the mean of first n natural numbers =5n/9

we know that meaning of n natural numbers = (n+1)/2

(n+1)/2=5n/9

9(n+1) = 2(5n)

9n+9= 10n

9= n

therefore the n = 9

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