Use the data in the following table, which lists drive-thru order accuracy at po
ID: 3073579 • Letter: U
Question
Use the data in the following table, which lists drive-thru order accuracy at popular fast food chains. Assume that orders are randomly selected from those included in the table. Drive-thru Restaurant A B C D Order Accurate 335 271 231 149 Order Not Accurate 40 54 32 17 If one order is selected, find the probability of getting an order from Restaurant A or an order that is accurate. Are the events of selecting an order from Restaurant A and selecting an accurate order disjoint events? The probability of getting an order from Restaurant A or an order that is accurate is nothing . (Round to three decimal places as needed.) Are the events of selecting an order from Restaurant A and selecting an accurate order disjoint events? The events are not are disjoint because it is is not possible to
Explanation / Answer
Ans:
P(A or accurate)=P(A)+P(accurate)-P(A and accurate)
=(375/1129)+(986/1129)-(335/1129)
=1026/1129
=0.909
The events of selecting an order from Restaurant A and selecting an accurate order are not disjoint events,as P(A and accurate) is not equal to zero(i.e. it is possible for A and accurate to occur together)
A B C D Total Accurate 335 271 231 149 986 not Accurate 40 54 32 17 143 Total 375 325 263 166 1129Related Questions
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