Question

In how many ways can a student select 8 out of 10 questions to work on an exam?

Answer 1

Solution:

Number of ways of selecting k things out of k things is given by,

Here, a student has to select 8 questions out of 10 questions.

Hence, total number of ways of selecting 8 questions out of 10 questions is,

  

Hence, total number of ways of selecting 8 questions out of 10 questions is 45.

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