- CFA Exams
- CFA Level I Exam
- Topic 1. Quantitative Methods
- Learning Module 3. Probability Concepts
- Subject 10. Principles of Counting
CFA Practice Question
BeigeBox, a computer manufacturer, can construct computer systems with any one of 4 processors, 2 memory configurations, 3 hard drives, 2 monitors, 2 keyboards, and 2 CD drives. How many unique configurations of computer systems can BeigeBox construct?
A. 192
B. 96
C. 384
Explanation: The multiplication rule of counting states with the number of combinations available when there are n_1 options in one aspect, n_2 in another, and so on, up to n_k, is n_1 * n_2 * ... * n_k. In this case, the number of combinations is 4*2*3*2*2*2 = 192.
User Contributed Comments 3
User | Comment |
---|---|
sunnyhui | this question is tricky cause people can have more then 1 cd drive so i feel like the author obviously dont know anything about computers |
abs013 | Who the hell needs to keyboards? |
jacojacobs | Sunnyhui, the question reads "any one of.." meaning you just get one of each, therefore only 1 CD drive, and only 1 of every item. |