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If the number of ways in which n different things can be distributed among n persons so that at least one person does not get any thing is 232. Then, n is equal to
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Correct option is B
Total number of ways = nnNumber of ways so that each person gets at least one thing (here, exactly one thing) = n!Given, nn – n! = 23211−1!=0,22−2!=2,33−3!=21,44−4!=232∴ n=4Similar Questions
The total number of 5-digit numbers of different digits in which the digit in the middle is the largest is
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