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Mathematics, 17.06.2021 19:10, tapiamelissa6
An instructor gives an exam with fifteen questions. Students are allowed to choose any eleven to answer.
Required:
a. How many different choices of eleven questions are there?
b. Suppose seven questions require proof and nine do not. How many groups of eleven questions contain five that require proof and six that do not?
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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