Question 157 Problem Solving 2018 GMAT Quantitative Review
Question 157 Problem Solving 2018 GMAT Quantitative Review
Video explanation[PQID: PS01334]: There are 10 books on a shelf, of which 4 are paperbacks and 6…
Comments
Jennifersays
Hello ! I was watching the solution you posted and that obviously is the shortest way! However what if we were to check each individual arrangement. That means if I were to opt for the 1P,4H … 4P,1H sequence, how can I solve the last one ?
I got the following values for the 1st three arrangements : 60+120+60
The last one show be 6. But is this solution correct ?
For the arrangement 4P,1H
(4!/4!) x (6!/1!*5!)
Hello ! I was watching the solution you posted and that obviously is the shortest way! However what if we were to check each individual arrangement. That means if I were to opt for the 1P,4H … 4P,1H sequence, how can I solve the last one ?
I got the following values for the 1st three arrangements : 60+120+60
The last one show be 6. But is this solution correct ?
For the arrangement 4P,1H
(4!/4!) x (6!/1!*5!)