SOLUTION: Four coins are flipped. What is the probability two are heads, given at least one is tails?
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Question 1115502: Four coins are flipped. What is the probability two are heads, given at least one is tails?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Look at the possible outcomes of the remaining three coins.
There are of them.
The number of heads is also listed.
HHH-3
HHT-2
HTH-2
HTT-1
THH-2
THT-1
TTH-1
TTT-0
There are three outcomes that have exactly two heads.
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