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jee king king Grade: 12
        

A question paper on mathematics consists of 12 questions divided into 3 parts A,B,C each containing 4 questions. In how many ways can an examinee answer 5 questions selecting at least one from each part?


 

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear jee king


A      B       C    total


1      1       3      5


1      2       2       5


1     3        1      5


2     1        2       5


2     2       1       5


3      1       1        5


 


so tatal possible ways = 4C14C14C3  +4C14C24C2  +4C14C34C1  +4C24C14C2  +4C24C24C1 +4C34C14C1


 



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7 years ago
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