Midterm_2_Sp_11

# What is the chance that a customer orders both a

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21. What is the chance that a customer orders both a hamburger and a Diet Coke? a. (.60)*(.50) b. (.80)*(.50) c. .60 + .50 – (.60)(.50)

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P(X≥60)=P(Z≥-1.6) so prob=1-0.0548=0.9452 ANS_0.9452________ 27. Find the amount of money that represents the cutoff for the top 25% of withdrawal amounts. Include a picture in your solution. Z=0.67 so X=100+0.67*25=116.75\$ ANS__\$116.75_______ #28-30: The number of televisions you sell in a day has this probability distribution: X 0 1 2 3 p(x) .1 .3 .2 .4 28. What is the average number of televisions you sell in a day? ANS____1.9TVs by expectation formula_____ 29. You make \$40 per day plus \$5 for every television you sell. What is your average daily salary? 40+5*1.9=49.5\$ ANS___49.5\$______ 30.

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