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24 December, 03:58

There are two cookie jars: jar 1 contains two chocolate chip cookies and three plain cookies, and jar 2 contains one chocolate chip cookie and one plain cookie. Blind - folded Fred chooses a jar at random and then a cookie at random from that jar. What is the probability of him getting a chocolate chip cookie?

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  1. 24 December, 07:08
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    P = 0.55 or 55 %

    Step-by-step explanation:

    First step: Fred has probability of 0,5 when chossing jar 1 or jar 2

    Second step : The probability of chossing one chocolate chp cookie in jar 1 is 3/5 and from the jar 2 is 1/2

    Then the probability of Fred to get a chocolate chip cookie is

    P (get a chocolate chip cookie) = (0.5 * 3/5) + (0.5 * 1/2)

    P = 0.3 + 0.25

    P = 0.55 or 55 %
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