problem solving

India
November 27, 2006 4:48am CST
If a code word is defined to be a sequence of different letters chosen from the 10 letters A, B, C, D, E, F, G, H, I, and J, what is the ratio of the number of 5-letter code words to the number of 4-letter code words?
1 response
@nuel_h (1593)
• Indonesia
27 Nov 06
i dont know, i really dont know. do u have the answer? its hard to think right now.