Posted by Anonymous on Tuesday, October 5, 2010 at 2:12pm.
A survey found that 25% of pet owners had their pets bathed professionally rather than do it themselves. If 18 pet owners are randomly selected, find the probability that exactly 5 people have their pets bathed professionally.

statistics  MathGuru, Tuesday, October 5, 2010 at 8:50pm
Use a binomial probability function table. Values to look up are: p = .25, n = 18, and x = 5.
Or...
Calculate it by hand:
P(x) = (nCx)(p^x)[q^(nx)]
...where q = 1  p. 
statistics  hasn, Wednesday, June 5, 2013 at 7:42pm
75

statistics  Anonymous, Tuesday, June 11, 2013 at 1:45pm
0.199