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if repetition is prohibited permutations number of

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Unformatted text preview: r of license plates with 3 letters and 4 digits = • . . . if repetition is prohibited = • Permutations: Number of ways of ordering n elements is: • Number of subsets of {1, . . . , n} = 1 Combinations • Binomial probabilities ￿n ￿ : number of k-element subsets k of a given n-element set • n independent coin tosses – P(H ) = p • Two ways of constructing an ordered sequence of k distinct items: • P(HT T HHH ) = – Choose the k items one at a time: n! n(n − 1) · · · (n − k +1) = cho...
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This document was uploaded on 03/17/2014 for the course EECS 6.041 at MIT.

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