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In 15! = 15*14*13*12*11*10*9*8*7*6*5*4*3*2*1 = 1307674368000 different ways. ANSWER
Solved.
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This problem is on PERMUTATIONS.
On Permutations, see introductory lessons
- Introduction to Permutations
- PROOF of the formula on the number of Permutations
- Simple and simplest problems on permutations
- Special type permutations problems
- Problems on Permutations with restrictions
in this site.