CFA Practice Question
Giorgio offers the person who purchases an 8 ounce bottle of Allure two free gifts, either an umbrella, a 1 ounce bottle of Midnight, a feminine shaving kit, a raincoat or a pair of rain boots. If you purchased Allure what is the probability you selected at random an umbrella and a shaving kit in that order?
A. 1.00
B. 0.05
C. 0.20
Explanation: There are 5 types of gifts. The probability of choosing an umbrella first is 1/5. Then the probability of choosing a shaving kit from the remaining four gifts is 1/4. So 1/5*1/4 = 1/20 = 0.05.
User Contributed Comments 5
| User | Comment |
|---|---|
| sh21 | I went crazy with this one, its quite simple actually. OR= Multiply AND= ADD |
| sh21 | my bad, guys this is the other way around...its MULTIPLY for AND...Sorry! |
| jimmy454 | its choosing without replacement probabilities |
| Polagaro | I used 5P2. |
| tzanchan | 5 NPR 2 worked for me as well. It comes out to 20 possible permutations. This is one of the twenty so it's .05. |