naveed_786110
New member
- Joined
- May 10, 2015
- Messages
- 26
The probability that a customer will buy a shirt is 0.4. A customer buys a tie 50% of the time when a shirt is
purchased, but only 10% the time when a shirt is not purchased.
Find the probability that a customer buys a tie?
Solution:
I solved it in this way.
P(Buy Shirt)=0.4 ====> P(Buy Tie) = 50%, P(NOT Buy Tie)=50%
P(Not Buy Shirt)=0.6 ===> P(Buy Tie) = 10%, P(NOT Buy Tie) = 90%
P(Buy Tie) = 0.4 * 0.5 + 0.6*0.10 = 0.26
BUT Manual says
P(Buy Tie) = 0.4 * 0.5 + 0.10 = 0.3
Whats wrong with my solution?
purchased, but only 10% the time when a shirt is not purchased.
Find the probability that a customer buys a tie?
Solution:
I solved it in this way.
P(Buy Shirt)=0.4 ====> P(Buy Tie) = 50%, P(NOT Buy Tie)=50%
P(Not Buy Shirt)=0.6 ===> P(Buy Tie) = 10%, P(NOT Buy Tie) = 90%
P(Buy Tie) = 0.4 * 0.5 + 0.6*0.10 = 0.26
BUT Manual says
P(Buy Tie) = 0.4 * 0.5 + 0.10 = 0.3
Whats wrong with my solution?