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OpenStudy (anonymous):
Tim has two irregular coins. The nickel comes up heads four fifths of the time, and the quarter comes up heads two thirds of the time. The nickel is tossed. If the nickel comes up heads, then the quarter is tossed twice. If the nickel comes up tails, the quarter is tossed once. Find the probability that exactly two tails come up.
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OpenStudy (anonymous):
bayes theorem?
OpenStudy (anonymous):
did you try to draw a tree diagram?
OpenStudy (anonymous):
I really don't understand the problem...
OpenStudy (anonymous):
|dw:1395461379392:dw|
OpenStudy (anonymous):
Can you fill the tree?
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OpenStudy (anonymous):
@nm61101
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