Question

how many words can be made by letter BIHAR

Answer 1

Bihar is made up of 5 words

B = 1 = Bharat
I = 2 = india
H = 3 = Hindustan
A = 4 = Aryavart
R = 5 = Ravi

☺☺☺☺

Answer 2

To calculate this sort of permutation, you take the factorial of the total number of letters, and divide by the product of the factorial of the count of each letter.

So for BIHAR - there are 5 total letters, and 1 each of B, I, H, A, and R. So you would get 5!1!1!1!1!1!=5!=1205!1!1!1!1!1!=5!=120.