There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks. How many possible selections of 5 books from the shelf contain at least one paperback and at least one hardback?
A) 75
B) 120
C) 210
D) 246
E) 252
Answer: D
Source: Official Guide
There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks. How many possible selections of 5 books
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- ygcrowanhand
- Senior | Next Rank: 100 Posts
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Hi GMATters,
Here is my video solution to this question:
https://www.youtube.com/watch?v=AJ4yOY4dtYk
Enjoy!
Rowan
Here is my video solution to this question:
https://www.youtube.com/watch?v=AJ4yOY4dtYk
Enjoy!
Rowan
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PS have you seen the new GMAT Work and Rates guide? Comes with a free 8-video course.
https://yourgmatcoach.podia.com/courses ... s-problems
Learn more about Private GMAT Tutoring at: https://privategmattutor.london