Mathematics, 30.07.2020 16:01, strawberrymrmr3432

There were 100 screws to choose from. 30 metal screws; 45 wood screws; and 25 plastic screws. 21 of these screws were sold. Leaving your answers in combinatorics format, what is the probability that: All 21 screws that were sold are of the same type? g

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There were 100 screws to choose from. 30 metal screws; 45 wood screws; and 25 plastic screws. 21 of...