SOLUTION: please help... I tried the 10*9*8*7*6*5*4*3*2*1 and that was not an option a teacher has a set of 12 problems to use on a math exam. The teacher makes different versions of the

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Question 40456: please help... I tried the 10*9*8*7*6*5*4*3*2*1 and that was not an option
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 differsnt exams can the teacher make?

Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
You would use permutations:
P(12,10) = 12!/(2!) = 239,500,800
This is if she cares how the test questions are ordered.