a math question

Nov 07, 2010 04:23

So i wasn't in class thursday because i was taking the ASBAP (sp?) and now I'm not really sure what to do with this homework. Normally I wouldn't ask because Mr. Camp won't care if i don't have it done but a) I would rather understand it now and b) I think that some of you might know right off the top of your head...

So we're in the section about binomial probability distributions

Multiple- choice questions each have five possible answers (a,b,c,d, or e) one of which is correct. Assume that you guess the answers to three such questions.
A) use the multiplication rule to find the probability that the first two guesses are wrong and that the third is correct. That is, find P(WWC) where C denotes a correct answer and W denotes a wrong answer.
B) Beginning with WWC , make a complete list of the different possible arrangements of two wrong answers and one correct answer then find the probability for each entry in the list.

I dislike being confused...but in all honesty he will explain it tomorrow so no worries. My neurotic self just wants to relieve guilt that I'm a horrible student for not finishing my homework :)
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