1.

In an exam, Arjun has to select 4 questions from each part. There are 6, 7 and 8 question in Part I, Part II and Part III, respectively. What is the number of possible combinations in which he can choose the question?

Answer»

Selecting 4 questions from Part I = 6C4 = 6C2

Selecting 4 questions from Part II = 7C4 = 7 C3

Selecting 4 questions from Part III = 8C4

The required number of ways

= 6C2 × 7C3 × 8C4 

= 15 × 35 × 70 

= 36750.



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