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Mathematics, 29.10.2019 15:31 mem81

Pls i dont know this

a bag contains 7 white marbles, 3 blue marbles, and 15 red marbles (and no other marbles). one marble is chosen without looking.

what is n(s)n(s) ?

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Answers: 3

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a bag contains 7 white marbles, 3 blue marbles, and 15 red marble...
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