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26 March, 04:42

There are 10 companies including A and B, to select 4 companies to participate in a project, what's the probability that A, B are selected at the same time?

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  1. 26 March, 05:12
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    3/5

    Explanation:

    Probability is given by number of possible outcomes : number of total outcomes

    Number of possible outcomes = 4, number of total outcomes = 10

    Probability (that A, B are not selected at the same time) = 4/10 = 2/5

    Probability (that A, B are selected at the same time) = 1 - 2/5 = (5 - 2) / 5 = 3/5
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