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5 December, 04:39

A bag contains 5 gray tiles and 2 blue tiles. Jenny reached into the bag and picked a tile randomly, and then without replacing it, picked a second tile. If you know that she picked a blue tile withher first pick, what is the probability that she picked a gray tile with her second pick?

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  1. 5 December, 04:55
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    Probability = Color asked for divided by total

    Pick one:

    Total 7 tiles

    5 gray, 2 blue

    probability of grey = 5/7

    probability of blue = 2/7

    Pick two

    One blue is removed so then you have

    total=6

    blue=1

    gray=5

    probability of gray = 5/6
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