Answer on Algebra Question for Ken
What is the probability of obtaining exactly five heads in six flips of a coin, given that at least one is a head?
The probability that you will toss five heads in six coin tosses given that at least one is a head is the same as the probability of tossing four heads in five coin tosses.
There are 32 permutations of five coins. Five of them have four heads. This is a probability of 5 in 32, or 0.15625.
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