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Lily Frequents One of Two Fast Food Restaurants, Choosing McDonald

Question 94

Essay

Lily frequents one of two fast food restaurants, choosing McDonald 25% of the time and Burger King 75% of the time. Regardless of where she goes, she buys French Fries on 60% of her visits.
a. The next time Lily goes into a fast food restaurant, what is the probability that she goes to McDonald and orders a French Fries?
______________
b. Are the two events in the previous question independent? Explain.
______________
c. Explain.
________________________________________________________
d. If Lily goes to a fast food restaurant and orders French Fries, what is the probability that she is at Burger King?
______________
e. What is the probability that Lily goes to McDonald, or orders French Fries, or both?
______________

Correct Answer:

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a. 0.15; b. Yes; c. Since P(F)...

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