A coin is tossed 7 times. Find the probability that exactly 3 are tails. The probability that exactly 3 are tails is (Type an integer or a simplified fraction. )
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The formula is given by: \[ P(X = k) = \binom{n}{k} p^k (1-p)^{n-k} \] where: - \( n \) is the total number of trials (coin tosses), - \( k \) is the number of successful outcomes (tails), - \( p \) is the probability of success on a single trial (getting Show more…
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