math

Could you explain to me why 9/64 is the answer to the following questions:A fair spinner is spun three times. The spinner is labeled A,B,C,D. What is the probability of getting a c exactly twice?

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asked by Mike
  1. because 9/64=3/16 (9/64)/3=3/16
    three spins, four possible answers per spin. 3*4=16.

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    posted by jerome
  2. prob(c) = 1/4
    prob(not c) = 3/4

    so you are looking for

    c c notc = (1/4)(1/4)(3/4) = 3/64
    c notc c = (1/4)(3/4)(1/4) = 3/64
    notc c c = (3/4)(1/4)(1/4) = 3/64

    prob of your event = 3(3/64) = 9/64

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    posted by Reiny
  3. Dera mom i love you so much do you love me

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    posted by ericka

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