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27 July, 12:47

A fish tank contains 18 goldfish and 22 guppies. If you randomly select 2 fish, what is the probability that they are both goldfish?

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  1. 27 July, 14:29
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    18 goldfish+22 guppies=40 total

    18/40 are goldfish and 22/40 are guppies

    Odds that 1 goldfish is chosen at random is 18/40 or 9/20 when simplified so odds that 2 goldfish are chosen at random is 9/20*9/20=81/400 or 20.25%
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