There is a set of 10 letters: A, B, C, D, E, F, G, H, I, J. There are five-character and four-character codes to be made out of these letters. Each of the codes can use any of the 10 letters without repeating them in any one code. What is the ratio of the total number of possible five-character codes to the number of possible four-character codes?
(A) 1:6
(B) 1:5
(C) 5:1
(D) 6:1
(E) 10:1
The OA is D.
I don't understand this PS question. Please, can any expert explain it for me? Thanks.
(A) 1:6
(B) 1:5
(C) 5:1
(D) 6:1
(E) 10:1
The OA is D.
I don't understand this PS question. Please, can any expert explain it for me? Thanks.
