JEE AdvancedMathematicsPermutations and CombinationsNumerical+3 / −1
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, = ?
Numerical answer
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