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The angle measures 22°, 62°, 118°, and 158° are written on slips of paper. You choose two slips of paper at random. What is the probability that the angle measures are supplemen…
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The angle measures 22°, 62°, 118°, and 158° are written on slips of paper. You choose two slips of paper at random. What is the probability that the angle measures are supplemen…
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Nov 23, 2018
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The angle measures 22°, 62°, 118°, and 158° are written on slips of paper. You choose two slips of paper at random.
What is the probability that the angle measures are supplementary? Enter your answer as a fraction.
P =
Mathematics
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Mengdi Liang
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Answer: 1/3
There are C(4,2) = 6 ways to choose a pair of numbers. Only 2 of those pairs are supplementary measures {22, 158} and {62, 118}. The probability is 2/6 = 1/3.
Drako
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Nov 27, 2018
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