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Mathematics 9 Online
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

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

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

OpenStudy (linn99123):

ohh lol i did a smily face fun not saying its D xD

OpenStudy (cwrw238):

oh ok!!! lol

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