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Mathematics
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OpenStudy (katherinesmith):
**MEDAL WILL BE AWARDED** A test consists of 20 problems and students are told to answer any 15 of these questions. In how many different ways can they choose the 15 questions?
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OpenStudy (katherinesmith):
@@zepdrix any clue
OpenStudy (anonymous):
If the order does't matter then \(\huge\frac{20!}{5!}\)
OpenStudy (katherinesmith):
can you help me with one more? @myko
OpenStudy (anonymous):
got to go
OpenStudy (katherinesmith):
okay
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