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OpenStudy (hba):
A particular geography textbook has 10 chapters. An instructor of seminar course wishes to cover seven of the chapters. How many ways can she do this? A) 112 B) 260 C) 72 D) 120 E) 700
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OpenStudy (hba):
@hartnn
OpenStudy (hba):
@Zarkon
OpenStudy (anonymous):
120
OpenStudy (kropot72):
The order of the chapters does not matter. So combinations are needed. 10C7=?
hartnn (hartnn):
familiar with combinations ?
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OpenStudy (anonymous):
yes it gives 120
OpenStudy (hba):
Ok got it thanks @kropot72
OpenStudy (kropot72):
You're welcome :)
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