SOLUTION: a teacher has a set of 12 problems to use on a math exam. The teacher makes different versions of the exam by putting 10 questions on each exam. How many different exams can the
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Question 12369: a teacher has a set of 12 problems to use on a math exam. The teacher makes different versions of the exam by putting 10 questions on each exam. How many different exams can the teacher make?
Answer by kusha(21) (Show Source): You can put this solution on YOUR website!
we can make selections of 10 out of 12 in c(12,10) ways
12!/10!2! = 66 ways
so he can make 66 papers
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