Question 1177792
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Hi
Binomial Distribution:  p (will hit target) = .40  
{{{P (x)= highlight_green(nCx)(p^x)(q)^(n-x) }}} 
(a) n = 6:  P(at least once) = 1 - P(x = 0) = 1 - .0467 = .9533
  1 0r 2 0r 3 0r 4 0r 5 0r 6
.1866 + .31104 + .2765 + .1382 + .0369 + .0041 = .9533

(b) n = 3   P(at least once) = 1 - P(x ≤ 0) = 1 - .22 = .78

Wish You the Best in your Studies.
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