For a class, Mrs. Hawk brought in 7 different packages of colored pens. The teacher randomly selects 2 packages. How many different combinations are there?

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asked Nov 15, 2021 2.9k views

1 vote

For a class, Mrs. Hawk brought

in 7 different packages of
colored pens. The teacher
randomly selects 2 packages.
How many different
combinations are there?

Mathematics
high-school

Rodent asked

by Rodent

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2 Answers

3 votes

Answer:

Explanation:

7x2=14

Suneel Kumar answered Nov 17, 2021

by Suneel Kumar

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2 votes

7C2 = 7!/[2!(7-2)!] = 7!/(2x5!) = 7x6/2 = 21
Therefore there are 21 possible combinations.

Stefan Wallin answered Nov 19, 2021

by Stefan Wallin

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