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21 April, 16:30

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 the students chosen are not both girls?

a. 12/190

b. 33/95

c. 62/95

d. 178/190

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  1. 21 April, 16:51
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    The answer is 62/95. You determine this by calculating the probability of both students being girls.

    Probability first student is girl: 12/20

    Probability second student is girl: 11/19

    Multiply 12/20 * 11/19 = 132/380 or 0.347

    Probability of both students not being girls: 1 - 0.347 = 0.653 or 62/95
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