Probability
posted by Anna .
What is the probability that you get at least one head in 4 tosses of a fair coin?
15/16, 3/4, 1/2, or 1/16?

It equals 1 minus the probability of zero heads. (If you get at least one, you don't get zero)
= 1  (1/4)^4
which is one of your choices
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