If the mean of the first n natural number is 15, then find n. Question If the mean of the first n natural number is 15, then find n. in progress 0 Math Adalynn 3 weeks 2021-10-01T20:47:00+00:00 2021-10-01T20:47:00+00:00 2 Answers 0 views 0

## Answers ( )

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Step-by-step explanation:The first n natural numbers are:

1, 2, 3, 4, ……….,n

Now, Mean = (1 + 2 + 3 + 4 +……….+ n)/n

=> 15 = (1 + 2 + 3 + 4 +……….+ n)/n

=> 15 = {n(n + 1)/2}/n

=> 15 = (n + 1)/2

=> n + 1 = 15 * 2

=> n + 1 = 30

=> n = 30 – 1

=> n = 29

So, the value of n is 29