A box contains 6 red pencils and 8 blue-pencils. A pencil is chosen at random and not replaced. A second pencil is then chosen at rand

Question

A box contains 6 red pencils and 8 blue-pencils. A pencil is chosen at random and not
replaced. A second pencil is then chosen at random. Calculate the probability that at least one
of the pencils is red

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Thiên Ân 4 years 2021-08-28T06:01:15+00:00 1 Answers 183 views 0

Answers ( )

  1. ngochoa
    0
    2021-08-28T06:02:34+00:00
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    Answer:

    There are 14 pencils and 8 are blue

    The probability of picking blue in the first pick = 8/14 =4/7.

    The probability of picking blue in the second pick = 7/13 (as no replacement was there).

    There are 14pencils and 6 are red.

    The probability of picking red in the first pick = 6/14 =3/7

    The probability of picking red in the second pick = 5/13. (as no replacement was there).

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