math 7
posted by rockrboiluvr on .
how many different ways can you choose 3 vowels out of the box, if there are 5 vowels in the box and the order does NOT matter? a. 10 b. 15 c. 30 d. 60
D?

Your answer would be the case if the order DID matter
the correct answer is C(5,3) = 10
in detail it would be
5!/(3!,2!) 
oh, thank you reiny!!!!

60

How many different ways can you choose 3 vowels out of the box, if there are 5 vowels in the box and order does not matter.