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Q.9. In how many ways can a student choose a programme of 5 courses if 9 courses are available and 2 specific courses are compulsory for every student?
Answers (1)
9 courses are available and 2 specific courses are compulsory for every student.
Therefore, every student has to select 3 courses out of the remaining 7 courses.
This can be selected in ways.
Thus, using multiplication principle, number of ways of selecting courses
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