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Question

A candidate is required to answer six out of 10 questions, which are divided into two groups, each containing five questions. He is not permitted to attempt more than four questions from either group. The number of different ways in which the candidates can choose six questions is

A
50
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B
150
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C
200
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D
250
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Solution

The correct option is C 200
The number of ways the candidate can choose questions under the given conditions is enumerated below.
Group 1Group 2Number of ways
42(5C4)(5C2)=50
33(5C3)(5C3)=100
24(5C2)(5C4)=50
Total number of ways200

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