Mark the correct alternative in the following:
In A.M.’s are introduced between 3 and 17 such that the ratio of the last mean to the first mean is 3 : 1, then the value of n is

Question

Mark the correct alternative in the following: In A.M.’s are introduced between 3 and 17 such that the ratio of the last mean to the first mean is 3 : 1, then the value of n is

Philoid · Accepted Answer

Let a=4 ;b=17

Let a₁,a₂,a₃,…a_n be the n A.M’s between 3 and 17

Then, common difference is given by

Now,

And

Now, given that

Mark the correct alternative in the following:In A.M.’s are introduced between 3 and 17 such that the ratio of the last mean to the first mean is 3 : 1, then the value of n is

Mark the correct alternative in the following:
In A.M.’s are introduced between 3 and 17 such that the ratio of the last mean to the first mean is 3 : 1, then the value of n is