Jill, who lives in City C, plans to visit 3 different cities, M, L, and S. She plans to visit each city exactly once and return to City C after the 3 visits. She can visit the cities in any order. In how many different orders can she visit the 3 cities?
A. 3
B. 6
C. 8
D. 9
E. 12
Please explain...
Got this question right by doing it the long way. but would like to see it done a little smoother..
thanks.
GMAT Prep?? (Probablitiy)-Jill
This topic has expert replies
This is essentially a permutation problem. Think of the problem as: "In how many ways can I arrange the order of the 3 cities". You can also rephrase it to follow the "chairs" analogy: "How many different seat arrangements can you have with 3 chairs and 3 individuals"
The answer is 3! = 3*2*1 = 6
The answer is 3! = 3*2*1 = 6