If a binomial distribution applies with a sample size of n = 20, find the probability of at least 7 successes if the probability of a success is 0.25.
show me the work and calculation using P(X)= [n! / (x!(n-x)!)] * p^x * q^n-x
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If a binomial distribution applies with a sample size of n = 20, find the probability of at least 7 successes if the probability of a success is 0.25.
show me the work and calculation using P(X)= [n! / (x!(n-x)!)] * p^x * q^n-x

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