Video explanation to GRE quantitative reasoning problem solving practice question.
Topic: Permutation Combination
Concept: Reordering or rearranging letters of a word.
How many words can be formed by re-arranging the letters of the word PROBLEMS such that P and S occupy the first and last position respectively? (Note: The words thus formed need not be meaningful)
B. (8! – 2!)
D. 8! – (2 * 7!)
E. 6! * 2!
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