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OpenStudy (linn99123):
How many combinations of 3 students can a teacher choose from 32 students? A. 96 B. 4960 C. 29,760 D. 32,768 i think it is B
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random231 (random231):
32C3
OpenStudy (cwrw238):
this 32C3
random231 (random231):
you are right linn!!
OpenStudy (cwrw238):
a quick way to do this 32*31*30 -------- 3*2*1
OpenStudy (cwrw238):
= 32*31*5
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OpenStudy (linn99123):
Yesh i was right :D
OpenStudy (cwrw238):
this is obtained from 32C3:- = 32! 32*31*30 * 29! ----- = -------------- 3! * (32-3)! 3*2*1 * 29!
OpenStudy (cwrw238):
no -its not D work it out again
OpenStudy (cwrw238):
its B
OpenStudy (cwrw238):
oh - you said B originally - sorry
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OpenStudy (linn99123):
ohh lol i did a smily face fun not saying its D xD
OpenStudy (cwrw238):
oh ok!!! lol
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