SOLUTION: there are 9 students in the class, two students forgot their lunch. The teacher chooses three students, what is the probability that none of the three of them forgot their lunch?

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Question 807736: there are 9 students in the class, two students forgot their lunch. The teacher chooses three students, what is the probability that none of the three of them forgot their lunch?
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
(7/9)(6/8)(5/7)=5/12