A disc jockey wants to select 4 songs from a new cd that contains 12 songs. How many ways can the disc jockey choose four songs?
2 answers:
I suppose a DJ wants to select 4 different songs, then there are: 12*11*10*9 = 11880 ways to choose them.
If the order of the songs he plays doesn't matter, there are:
ways to choose them.
Answer:
The answer is NOT 495 WAYS (for when choosing 5) !!!! The CORRECT answer is 792!!!!!
>>>495 may be the answer "when choosing (four)"
UPDATE: This is the answer for when "choosing FIVE" not FOUR.
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the answer is the last one
It would take him 30 mins
Increasing
Increasing
Decreasing
t=3
t=14
V=4