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1 in 5.45 of picking at least 2 blue marbles

any 2 from 3 is 3

correct picks =3X7(red)=21 of 2 blue only

1 pick of 3 blue only

any 3 from 10=120

120/22=5.45

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Q: If you had ten marbles 3 blue and 7 red and you picked out three marbles at the same time what would be the odds of picking 2 blue marbles?
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