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Mathematics 21 Online
OpenStudy (anonymous):

Jeanna makes flower arragments. she had 17 different cut flowers and plans to use 4 of them. how many different selections of 4 flowers are possible?

OpenStudy (anonymous):

How many ways can the flowers be chosen?

OpenStudy (anonymous):

Remember, when you are Choosing, you use nCr

OpenStudy (anonymous):

When order doesn't matter, so out of 17, choose 4 = 17C4

OpenStudy (anonymous):

by using the formula we used before?

OpenStudy (anonymous):

Yes, 17C4 = 17!/(4!(17-4)!) = (17*16*15*14)/(4*3*2*1)

OpenStudy (anonymous):

85680?

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