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V. Combinatorics Permutations of n objects n! Arrangements: of n object in k spots: n!/(n-k)! k-Combinations of n objects: n!/[(n-k)! * k!] DanaJ For the Arrangements.... if I have 4 chairs to put in 6 spots, does the equation look like this?: 4!/(4-6)! ...a negative 2! would be in the denominator....
- by sweatitsmart
Thu Mar 10, 2011 1:25 am- Forum: GMAT Math
- Topic: Dana's Quant Strategy suggestions
- Replies: 16
- Views: 26486
Hi Dhana, I would specifically want to comment on your statement "If you go for bigger numbers, your calculations might suffer." . I believe that the DS problem of prime numbers can be resolved in one flick using the number 31 which is not nearer to 0. Using numbers nearer to 0 only increa...
- by sweatitsmart
Tue Mar 08, 2011 10:21 pm- Forum: GMAT Math
- Topic: Dana's Quant Strategy suggestions
- Replies: 16
- Views: 26486