Question

How many combinations are possible? Assume the items are distinct.

7 items chosen 2 at a time
____ combinations

Answer 1

• 21 combinations

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Find the combination of 2 out of 7:

• 7C2 =
• 7!/[(7-2)! * 2!] =
• 7! / (5! * 2!) =
• 6*7/2 =
• 21

There are 21 combinations.