Discount Value X 0 9 Probability 21 26 31 0.25 0.30 0.25 0.10 0.10

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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On valentine's day, the Quiet Nook restaurant offers a Lucky Lovers Special that could save couples money on their romantic dinners. When the waiter brings the check he also brings a scratch-off ticket that the couple scrapes to reveal a hidden number; call this number X. The value of the number X is the dollar amount that will be subtracted from the dinner bill. The possible values of the scratch-off number X are shown in the table below. The table also shows the probability distribution of the values of X. a) for the past several weeks, the restaurant has also been distributing coupons worth $5 off any dinner for two. The coupon can be used in addition to the discount X from the scratch-off ticket. If every couple dining there on Valentine's Day also brings a $5 coupon, what are the expected value and standard deviation of the total discount the couples receive?
Discount Value X 0 9
Probability
21 26 31
0.25 0.30 0.25 0.10 0.10
Transcribed Image Text:Discount Value X 0 9 Probability 21 26 31 0.25 0.30 0.25 0.10 0.10
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