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four ordinary quarters and have a quarter with two heads are placed in a hat. one quarter selected at random and tossed twice. if the outcome is "HH", what is the probability that's a fake quater was selected
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four ordinary quarters and have a quarter with two heads are placed in a hat. one quarter selected at random and tossed twice. if the outcome is "HH", what is the probability that's a fake quater was selected

User Mdeora
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2 Answers

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2:4 is the probability. It is more likely to receive a ordinary quarter, but the probability of the two headed quarter is still great enough to get it.
User Jan Willem Tulp
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3 votes

Answer:

Pr(fake quarter selected)=(1/2)(1/2)=1/4=0.25

User Sir Lojik
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