if the mean of first n natural numbers is 5n/9 then what is the value of n?
Answers
Answered by
120
this is the answer.. hope u r satisfied
Attachments:
Pranjal789:
n(n+1)/2 i not understand
it is the sum of n natural number
heyy bro i got a mistake
ur question contains mean not sum... so instead of n(n+1) use only n+1
so (n+1)/2 = 5n/2
5n/9..so answer will be 9
ok txxx
Answered by
305
Given that the mean of first n natural numbers = 5n/9.
We know that mean of n natural numbers = (n + 1)/2.
(n + 1)/ 2 = 5n/9
9(n + 1) = 2(5n)
9n + 9 = 10n
9 = n.
Therefore the value of n = 9.
Hope this helps!
We know that mean of n natural numbers = (n + 1)/2.
(n + 1)/ 2 = 5n/9
9(n + 1) = 2(5n)
9n + 9 = 10n
9 = n.
Therefore the value of n = 9.
Hope this helps!
Similar questions