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3 December, 09:28

Mrs. Synder must choose two of her homeroom students to be class representatives. The class consists of 13 girls and 9 boys. Approximately what percent chance is there that the first student chosen is a boy and the second student chosen is a girl? (Round to the nearest percent)

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  1. 3 December, 13:07
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    Relative frequency = event*sample space

    13 girls + 9 boys = 22 students

    9/22 = 4090909091

    4090909091*100 = 40. 9 ... % = 41% (rounded)

    There is a chance of 41% of the first chosen being a boy.

    Since, a boy has already been a boy, we need to remove this number from the sample space. There is now a sample space of 21 instead of 22.

    13/21 = 0.619047619

    0.619047619*100 = 61.9 ... % = 62% (rounded)

    There is a chance of 62% of the second chosen being a girl.
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