Question 353099
Three fair dice, one white, one red and one black, are tossed and the number of spots on the top faces are noted. Which of the following have probability 1/4 :
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There are 6^3 = 216 possible outcomes
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(a) The red die is a six or the black die is even.
Ways to succeed: 1*3*6 = 18
P(event) = 18/216 is not 1/4
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(b) All three numbers are even.
Ways to succeed: 3*3*3 = 27
P(event) = 27/216 is not 1/4
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(c) The red die is even and the black die is 4 or more.
Ways to succeed: 3*3*6 = 54
P(event) = 54/216 = 1/4
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(d) Exactly two of the three numbers are equal.
Ways to succeed: 6*6*5 = 180
P(event) = 180/216 is not 1/4
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(e) None of the above----no
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cheers,
Stan H.
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