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Question

The number of ways in which a student can choose 5 courses out of 9 courses if 2 courses are compulsory is


A
32
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B
33
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C
34
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D
35
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Solution

The correct option is C 35
Out of 9 courses 2 are compulsory and student has to take total 5 courses.
That means student has choice to take any 3 courses out of remaining 7.
Hence number of ways $$=^7C_3 =35$$

Maths

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