Question 369672
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Hi,
Note: The probability of x successes in n trials is: 
.
P = nCx* {{{p^x*q^(n-x)}}} where p and q are the probabilities of success and failure respectively. 
In this case p = .15 and q = .85
nCx = {{{n!/(x!(n-x!))}}}

P( at least one) = 1 - P(catching none) = 1 - (.85)^3 = 1 - .614 = .386