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23 November, 20:59

Question 6

In a box of 11 parts, 4 of the parts are defective. Two parts are selected at random without replacement.

Find the probability that both parts are defective.

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Answers (1)
  1. 24 November, 00:48
    0
    The probability that both parts are defective is 6/55

    Step-by-step explanation:

    Defective parts = 4

    Total parts = 11

    Probability of getting a defective part = 4/11

    Probability of getting defective part 2nd time = 3/10

    Total probability of getting defective part both the times = (4/11) (3/10)

    = (12/110)

    = (6/55)

    The probability that both parts are defective is 6/55
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