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1000 PS

presently we are in alpha stage , incase of typos please report at http://thousandps.blogspot.com/2009/11/bugs.html. we would be uploading all the 1000 Questions soon .

Thursday, November 19, 2009

PS 110

For a positive integer n, the number n! is defined to be n(n - 1)(n - 2)…(1). For example, 4!=4(3)(2)(1). What is the value of 5!-3!?
(A) 120
(B) 114
(C) 20
(D) 15
(E) 2

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