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30 December, 23:54

A small class has

10

students,

5

of whom are girls and

5

of whom are boys. The teacher is going to choose two of the students at random. What is the probability that the first student chosen will be a girl and the second will be a boy? Write your answer as a fraction in simplest form.

+3
Answers (2)
  1. 31 December, 00:04
    0
    The probability of girls chosen first is 5/10=1/2.

    Then the probability of boys chosen after is 5/9. So the probability of both event is 1/2 * 5/9 = 5/18.
  2. 31 December, 00:09
    0
    There are 4 possibilities

    BB

    GG

    BG

    GB

    hence the answer is 1/4
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