Question

1-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         / 12 / 23 / 11 / 34
Order Not Accurate     / 32 / 34 / 33 / 9

If one order is​ selected, find the probability of getting an order from Restaurant C or an order that is accurate. Express your answer as a percentage rounded to the nearest hundredth.

2-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         / 46 / 5 / 12 / 32
Order Not Accurate     / 20 / 46 / 37 / 12

If three different orders are​ selected, find the probability that they are all from restaurant B. Assume that the orders are selected without replacement. Express your answer as a percentage rounded to the nearest hundredth.

Answer 1

1)

		A	B	C	D	Total
accurate		12	23	11	34	80
not accurate		32	34	33	9	108
Total		44	57	44	43	188

probability of getting an order from Restaurant C or an order that is accurate =(113/188)=0.6011~ =60.11%

2)

		A	B	C	D	Total
accurate		46	5	12	32	95
not accurate		20	46	37	12	115
Total		66	51	49	44	210

P(all from restaurant B) =(51*50*49)/(210*209*208)=0.0137 ~1.37%