The director of an institute know that there is a 2% probability that all of the students who take the Statistics exam, one will fail and the remainder will pass.  If, following exam, the director selects a random sample of 23 independent students, what would a probability be that ll of them would have passed? Use the binomial distribution formula P(x)= n!/(n-x)!x!  . px.  .     qn-x

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