Quant Question Of The Day: 211
Amit has solve a match the following puzzle in which there are 6 questions in one column with 6 answers in the next column. In how many ways Amit can answer exactly 3 of them correctly.
- 40
- 20
- 64
- 120
Answer: (1) 40 Number of ways to pick 3 correct pairs = 6C3 = 20 ways further number of dearrangements of the remaining 3 = 2 total ways = 20*2 = 40
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