Question 22
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In how many ways can 3 letters be selected from the letters of ALLAHABAD?
- A 84
- B 19 Correct
- C 10
- D 35
Correct Answer: Option B
Letters: A × 4, L × 2, H, B, D
All different: 5C3 = 10
Two alike + one other: A or L pair × 4 others = 8
Three alike: AAA = 1
Total = 19
Trap: 84 = 9C3 treats all 9 letters as different.
Answer: 19
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