SOLUTION: There are 21 students in Mrs. Smith’s algebra class. Mrs. Smith randomly chooses 3 students to work problems on the board each day. What is the probability that Carly will be ask
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Question 388848: There are 21 students in Mrs. Smith’s algebra class. Mrs. Smith randomly chooses 3 students to work problems on the board each day. What is the probability that Carly will be asked to work a problem today if one student is absent? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! There are 21 students in Mrs. Smith’s algebra class. Mrs. Smith randomly chooses 3 students to work problems on the board each day. What is the probability that Carly will be asked to work a problem today if one student is absent?
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1 - P(all three are chosen from the remaining 19 students)
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= 1 - 19C3/20C3
= 1 - 0.85
= 0.15
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Cheers,
Stan H.
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