SOLUTION: An instructor gives his class a set of 20 problems with the information that the next quiz will consist of a random selection of 10 of them. If a student has figured out how to do
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Question 366890: An instructor gives his class a set of 20 problems with the information that the next quiz will consist of a random selection of 10 of them. If a student has figured out how to do 17 of the problems, what is the probability the he or she will answer correctly at least 9 problems? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! x=.85 y=.15
Expand (x+y)^10
x^10+10x^9y=.5443 the probability the he or she will answer correctly at least 9 problems.
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Ed
