Latest self Aptitude Question SOLUTION: An examination paper consists of 7 questions, 4 in part A and 3 in part B. A student has to attempt 5 questions in all, such that he should select at least 2 from each part.In how

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(#M40009617) SELF question Keep an EYE

An examination paper consists of 7 questions, 4 in part A and 3 in part B. A student has to attempt 5 questions in all, such that he should select at least 2 from each part.In how many number of ways it can be done ?

Devendra Marghade (12 years ago)

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Balakrishnan M  (12 years ago)

3 questions in Part A & 2 questions in Part B are selected = 4c3*3c2 ways
2 questions in Part A & 3 questions in Part B are selected = 4c2*3c3 ways
5 questions in all, such that he should select at least 2 from each part is = 4c3*3c2 + 4c2*3c3
= 4*3+6*1 = 12+6 = 18 ways

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