Question

If the mean of first n natural numbers is 3n/5, then the value of n is: (a)3(b)4(0)5(d)6​

Answer 1

Answer:

The answer is (c) 5.

Step-by-step explanation:

n+1/2=3n/5

5(n+1)=2(3n)

5n+5=6n

=5

Answer 2

Answer:

Mean of n natural no.=3n/5

we know that mean of n natural no.=(n+1)/2

hence,

n+1/2= 3n/5

5(n+1) = 2(3n)

5n+5 = 6n

n= 5