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10 November, 22:20

Two students from a group of eight boys and 12 girls are sent to represent the school in a parade if the students are chosen at random what is the probability that both students are girls?

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  1. 10 November, 22:41
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    If you choose one person from the group, you have a 12/20 chance of them being a girl. Now, if the first person is a girl, we have one less girl and one less person to choose from. So, the new probability for the second person is 11/19.

    Then, we multiply the chances

    12/20 * 11/19

    3/5 * 11/19

    33/95
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