In How many ways can a student chose 5 courses out of 9 courses if 2 specific courses are compulsory for every student?

Question

Philoid · Accepted Answer

Since every student needs to choose 5 courses out of which 2 are compulsory. So, the student needs to choose 3 subjects out of 7 .

No. of ways for choosing 3 subjects out of 7 is ⁷C₃

Applying formula, ⁿC_r = , we get

= 35 ways.