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OpenStudy (anonymous):
A teacher gives her class 20 study questions, from which she will select 8 to be on the final exam. How many ways can she select the questions?
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OpenStudy (anonymous):
80
OpenStudy (alexwee123):
how did you get 80? o,0 @samm2121
OpenStudy (anonymous):
theres 20 study questions and she will select 8 you just times them sorry wrong answer its actually 160
OpenStudy (alexwee123):
can you elaborate? because i don't think that's the right answer
OpenStudy (anonymous):
the answer is 160
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OpenStudy (alexwee123):
cuz you would take the combination of this there are 20 questions and 8 are chosen unordered so it would be |dw:1337996772770:dw|
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