Mathematics, 15.12.2020 03:50 Cocco
At the end of a weeklong seminar, the presenter decides to give away signed copies of his book to 4 randomly selected people in the audience. How many different ways can this be done if 30 people are present at the seminar?
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At the end of a weeklong seminar, the presenter decides to give away signed copies of his book to 4...
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