Question

Elena is managing a construction project. She has 7 workers available to work on a given day, and she needs to

select 5 of them.

How many different sets of 5 workers can Elena choose?

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Answer 1

Answer:

21 for khan

Explanation:

here's the formal if you need it:

nCr= n!  /  (n−r)!⋅r!

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