Chapter 4: Q11 (page 156)
In Exercises 9鈥20, use the data in the following table, which lists drive-thru order accuracy at popular fast food chains (data from a QSR Drive-Thru Study). Assume that orders are randomly selected from those included in the table.
惭肠顿辞苍补濒诲鈥檚 | Burger King | 奥别苍诲测鈥檚 | Taco Bell | |
Order Accurate | 329 | 264 | 249 | 145 |
OrderNotAccurate | 33 | 54 | 31 | 13 |
Fast Food Drive-Thru Accuracy If one order is selected, find the probability of getting an order from 惭肠顿辞苍补濒诲鈥檚 or an order that is accurate. Are the events of selecting an order from 惭肠顿辞苍补濒诲鈥檚 and selecting an accurate order disjoint events?
Short Answer
The probability of getting an order from 惭肠顿辞苍补濒诲鈥檚 or an accurate order is equal to 0.9123.
No, these two events are not disjoint.