SOLUTION: in an exam student is to answer 10 of 13 questions find the probability that: he must answer the first two question? he must answer the first or the second but not both? he must

Question 925723: in an exam student is to answer 10 of 13 questions find the probability that: he must answer the first two question?
he must answer the first or the second but not both?
he must answer exactly 3 of the first 5 questions?
he must answer at least 3 of 5 question?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
13 Questions: 10A, 3(not answered)
P(answering first two) =
P(first or the second but not both) =
P(exactly 3 of the first 5 questions) =
P( 3 0r 4 0r 5) =
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