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21 June, 11:02

A bag contains 4 red marbles and 5 blue marbles. If two marbles are chosen at random, one at a time and without replacement, what is the probability of getting two red marbles?

A. 5/18

B. 40/81

C. 16/81

D. 1/6

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Answers (1)
  1. 21 June, 13:55
    0
    P (red) 4/9 on the first pull, P (red) 3/8 on the second pull

    (4/9) (3/8) = 12/72 = 1/6 Letter D
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