Question

Word of length 10 is formed using the letters A, B, C, D, E, F, G, H, I, J. Let X be the number of such word where no letter is repeated and y see the number of such words where exactly are letters are repeated twice and no other letter is repeated then y/9x

Answer 1

Answer:

I think it is a fair answer

Step-by-step explanation:

Words of length 10 are formed using the letters A,B,C,D,E,F,G,H,I,J. Let x be the number of such words where no letter is repeated; and let y be the number of such words where exactly one letter is repeated twice and no other letter is repeated. Then, 9xy is equal to.