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. 

1. 40
2. 20
3. 64
4. 120

See our previous ‘Questions of the Day’: 

Quant Question Of The Day: 210

Quant Question Of The Day: 209