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18 March, 16:56

There are 3 strawberry ice creams, 4 chocolate ice creams, and 7 vanilla ice creams on a tray. barbara selects 2 ice creams at random without replacement. what is the probability that she selects 2 chocolate ice creams?

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  1. 18 March, 17:54
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    There are 14 ice cream all in all. Choosing two out of the 14 ice cream can be determine by the equation,

    14C2 = 91

    Then, there are 4 chocolate ice creams. Choosing two out of the 4 ice cream id determined through the equation,

    4C2 = 6

    Thus, the probability that she selects 2 chocolate ice cream is equal to 6/91.
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