GRE Quant Practice – Permutation Probability – Easy Question - Videos

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Video explanation to an easy GRE permutation combination problem solving practice question that appeared as part of Wizako’s GRE Quant Topic Test.

Question
There are 5 doors to a lecture room. In how many ways can a student enter the room through a door and leave the room by a different door?
A. 10
B. 9
C. 20
D. 625
E. 1024

More GRE Quant and Verbal practice questions @ https://practice-questions.wizako.com/gre/

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