Question

Need Help! 10 points!

A home alarm system randomly assigns a four-character code for each person. The code will not repeat a character. The characters are 2, 3, 4, 5, M, V, T, or R. What is the total number of codes that can be randomly assigned?

A. 6,720 codes


B. 1,680 codes


C.336 codes


D. 20,160 codes

Answer 1

The answer is 1680. To get this you do 8*7*6*5 because there are 8 options for the first character, and then you can repeat that for the second one with 7, 6, and 5