Question 16
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An exam has two sections of 5 questions each. A candidate must answer 6 questions with at least 2 from each section. In how many ways can he choose?
- A 210
- B 150
- C 252
- D 200 Correct
Correct Answer: Option D
(2, 4): 10 × 5 = 50
(3, 3): 10 × 10 = 100
(4, 2): 5 × 10 = 50
Total = 200
Trap: 210 = 10C6 ignores the section rule.
Answer: 200
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