Permutation and Combination
Permutation and Combination
MediumAptitude0% accepted
Solve permutation and combination problems: arrange 5 people in a row with 2 specific people always together; form committees; number of words from MISSISSIPPI; seating in circular arrangements.
Approach
Solve arrangement and selection problems using P and C formulas.
Input
Arrange 5 people in row, A and B always together
Output
Treat AB as 1 unit: 4! arrangements * 2! (AB internal) = 48
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