Mathematics, 27.09.2021 02:00 dlatricewilcoxp0tsdw
A town library is considering loaning video games, and surveyed its membership to ask their 4 favorite PlayStation 3 Games from among the following six: Gran Turismo, Call of Duty 4, Metal Gear Solid 4, Little Big Planet, Grand Theft Auto 5, & Final Fantasy 13. How many different possible sets of four favorites are there? According to the textbook, the answer should be 15, but I'm a bit lost. What are the steps I need to take or the formula I need to use in order to get this answer?
Answers: 3
= number of combinations
n= total number of objects in the set
r= number of choosing objects from the setn! = 1*2*3*...*n (in case you don't know the factorials)
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