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Old 07-28-2007   #1
sleepsheepnyc
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Default Need help with probability problem (intro level)?

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.What is the probability that Lily goes to McDonald, or orders French Fries, or both?Please help!!!Yes, 60% of her visits, not 60 visits.Thanks!
 
Old 07-28-2007   #2
Lydia L
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697007%jk
 
Old 07-28-2007   #3
Sarah is getting married!
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The probability that she goes to macdonalds is 25% (25/100 = 0.25 if they want a decimal answer)The probability that she orders frenc fries is 60% (60/100 = 0.6)The probability that she does both is 0.25 *0.6 =0.15 or 15% of the time
 
 

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