In how many ways 3 numbers can be chosen from first 10 natural numbers such that there are at least two numbers between any two selected numbers?

1. 10
2. 15
3. 20
4. 25

See our previous ‘Questions of the Day’:  

Quant Question Of The Day: 148
Quant Question Of The Day: 147



    XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>