SOLUTION: In how many ways can 4 birthday cards be selected from 22 different cards?

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Question 1008167: In how many ways can 4 birthday cards be selected from 22 different cards?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
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C%5B22%5D%5E4 = %2822%2A21%2A20%2A19%29%2F%281%2A2%2A3%2A4%29 = 7315.

This is the number of combinations of 22 objects taken 4 at a time.

See the lesson Introduction to Combinations in this site.