SOLUTION: a coin is biased so that a head is twice as likely to occur as a tail.If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head?

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Question 555025: a coin is biased so that a head is twice as likely to occur as a tail.If the coin is tossed 3 times, what is the probability of getting 2 tails and 1 head?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
h=2/3, t=1/3
(h+t)^3
nCr=3C2=3
3ht^2
= 3 * 2/3 * (1/3)^2
=2/9 the probability of getting 2 tails and 1 head.
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Ed