posted by SAM .
Yesterday, at a local restaurant, 60% of the customers ordered a burger.
If 42% of the customers ordered a burger and fries, what is the probability that a customer who ordered a burger also ordered fries?
If 15% of the customers ordered a burger and onion rings, what is the probability that a customer ordered onion rings given that he/she ordered a burger?
MATH! :( Conditional Probability -
The conditional probability of event A happening given B is given by
P(A|B) = P(A∩B)/P(B)
In the example,
B=customers ordered burgers
F=customers ordered Fries
So probability of ordering fries given the customer ordered a burger is
R=customers ordered onion Rings