SOLUTION: Determine the number of different groups of 4 questions a teacher could select from a set of 10 distinct questions

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Question 1022189: Determine the number of different groups of 4 questions a teacher could select from a set of 10 distinct questions
Answer by ikleyn(52781) About Me  (Show Source):
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C%5B1%5D%5E4 = %2810%2A9%2A8%2A7%29%2F%281%2A2%2A3%2A4%29 = 10*3*7 = 210,

the number of combinations of 10 things take 4 at a time.

See the lesson Introduction to Combinations in this site.