This math topic focuses on calculating probabilities using permutations and their operation in various expressions. It provides practice in solving problems using `nPm` notation, which denotes the number of permutations of `n` items taken `m` at a time. The expressions involve operations like multiplication to simplify probability components. This subject helps students deepen their understanding of permutations and enhances their computational skills involving factorial-based computations in probability settings.
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Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
What is the value of this probability expression?