Engineering
Mathematics
Addition Theorem on Probability
Basic Definitions Related to Probability
Binomial Probability Theorem
Question

Consider the following events.
E1: Six fair dice are rolled and at least one die shows six.
E2: Twelve fair dice are rolled and at least two dice show six.
Let P1 be the probability of E1 and P2 be the probability of E2. Which of the following is true?

P1 = P2 = 0.3349

P1 < P2

P1 > P2

P1 = P2 = 0.6651

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Solution
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P1 = 1 – (no die shows six)

p1=1(56)6=0.665102

P2 = 1 – (no die show six, and one die shows six)
p2=1(56)1212!1!×11!(56)11×16=0.618667
P1 > P2