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In an examination paper there are two groups each containing 4...

This question belongs to Arithmetic Ability Permutation And Combination
Permutation and Combination
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In an examination paper, there are two groups each containing 4 questions. A candidate is required to attempt 5 questions but not more than 3 questions from any group. In how many ways can 5 questions be selected?

Answer & Solution
Correct Answer: Option B
5 questions can be selected in the following ways,
2 question from first group and 3 question from second group Or 3 question from first group and 2 question from second group.
= (4C2 × 4C3) + (3C4 × 4C2)
= 24 + 24
= 48
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Rashadul Kabir
Rashadul Kabir 7 years ago
(4C2 × 4C3) + (4C3 × 4C2)
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