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 not accurate	40	53	31	19

if one order is selected, find the probability of getting food that is not from restaurant a.
the probability of getting food that is not from restaurant a is
(round to three decimal places as needed.)

Explanation:

Step1: Calculate total number of orders

Total orders = (311 + 40)+(264 + 53)+(233+31)+(135 + 19)
= 351+317+264+154
= 1086

Step2: Calculate number of orders from Restaurant A

Orders from Restaurant A = 311 + 40 = 351

Step3: Calculate number of orders not from Restaurant A

Orders not from Restaurant A=1086 - 351 = 735

Step4: Calculate the probability

Probability = $\frac{735}{1086}\approx0.677$

Answer:

0.677