Question: How many different 4-letter permutations can be formed from the letters in the word WESTINGHOUSE? How many ways can 3 cards are selected from a

How many different 4-letter permutations can be formed from the letters in the word WESTINGHOUSE?

How many ways can 3 cards are selected from a standard deck of 52 cards, disregarding the order of selection?

Given the letters M, N, O and P, list the permutations and combinations for selecting 2 letters.

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