SOMEONE ASKED 👇
How many ways can 3 singers be selected from 5 who came to an audition?
HERE THE ANSWERS 👇
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10
You use combination because order does not matter.
n C r = n! / r!(n-r)!
Now substitute your numbers.
5 C 3 = 5*4*3*2*1 / 3*2*1(2*1)
That’s how you get 10.
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