SOLUTION: How many ways can you make a sandwich by choosing 4 of 10 ingredients?

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Question 851766: How many ways can you make a sandwich by choosing 4 of 10 ingredients?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

10C4 = 10%2A9%2A8%2A7%2F%284%2A3%2A2%29 = 210 ways