The maitre 'd at an expensive Manhattan restaurant has noticed that 60% of the couples order dessert...

The maitre 'd at an expensive Manhattan restaurant has noticed that 60% of the couples order dessert and coffee. However, 20% of the couples who order dessert don't order coffee. What is the probability R that the next couple the maitre 'd seats will not order dessert?

Quiz

Answer/Solution

25%

Steps/Work

could you use a venn diagram and just go with the number 100.
60 people order dessert and coffee... which is the union of D and C.
R=2/10 of D aren't in D U C = so 8/10 of D are in DUC which means =60 =8/10D. So D in total=75, and 15 D's aren't in D union C. which means 25 people are in C only + Neither.
B 25%

Probability Calculator / Auto Solver

The maitre ' d at an expensive manhattan restaurant has noticed that % of the couples order dessert and coffee. However, % of the couples who order dessert do n ' t order coffee. What is the probability r that the next couple the maitre ' d seats will not order dessert?

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