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16 August, 13:43

A bag contains two red marbles and five blue marbles. you draw a marble, record its color, replace it, and then draw a second marble. what is the probability that you draw a blue marble at least once?

a. 0.28

b. 0.49

c. 0.71

d. 0.92

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Answers (1)
  1. 16 August, 13:59
    0
    2+5 = 5 total marbles

    5 are blue so you have a 5/7 chance of picking blue each time

    5/7 = 0.714 rounded to 0.71
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