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Earn +20 ptsQ: What is the probability of getting two heads?
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When a coin is tossed three times what is the probability of getting at most two heads?
The opposite of getting at most two heads is getting three heads. The probability of getting three heads is (1/2)^2, which is 1/8. The probability of getting at most two heads is then 1 - 1/8 which is 7/8.
What is the probability of tossing four coins and getting four heads if the first two tosses are heads?
The conditional probability is 1/4.
What is the probability of getting only heads on the two tosses?
1/4
What is the probability of getting heads on the one flip of coin?
There are two sides to the coin, so the probability of getting heads or tails on one flip of the coin is 1/2 or 50%.
What is the probability of getting two heads in unbiased coin?
In two tosses: 1/4.
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