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	337	278	231	123
Order Not Accurate	36	52	40	15

If one order is​ selected, find the probability of getting an order that is not accurate.

The probability of getting an order that is not accurate is

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	316	270	241	148
Order Not Accurate	37	60	30	15

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

Answer 1

To calculate the probability we will use addition theorem of probability.