There are 12 students in a social studies class. Three students will be selected to present their term projects today. In how many different orders can three students be selected?
9 answers
12! ways
That's not one of the answer choices.
A. 1,320
B. 220
C. 504
D. 36
A. 1,320
B. 220
C. 504
D. 36
Answer - A. 1,320
Nope...
12 students and you are "choosing" three to do their presentation.
Order doesn't matter, so you have a combination 12C3
by definition of combination you have
12C3= n!/(r!(n-3)!
= 12! divided by 3!(9!)
= 12 x 11x10 /3x2x1
= ...
12 students and you are "choosing" three to do their presentation.
Order doesn't matter, so you have a combination 12C3
by definition of combination you have
12C3= n!/(r!(n-3)!
= 12! divided by 3!(9!)
= 12 x 11x10 /3x2x1
= ...
Sorry - I missed the "three"
Ash
So is it a,b,c, or ,d?
its A. 1,320
i just took the test
i just took the test
urmom, do you have the rest of the ansvers by any chance ?