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(#M40024371) TCS question Keep an EYE

Consider all permutations (i.e. arrangements) of the digits 1, 2 and 3. We will say that a hit has been scored if at least one digit occurs in its proper position in the permutation, i.e. if 1 occurs in the first position, or 2 in the second position, or 3 in the third position. In how many of these permutations is a hit scored?

Asked In TCS Hemadevi (10 years ago)

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