Question

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Part 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
319
277
249
131
Order Not Accurate
34
57
33
19
If one order is​ selected, find the probability of getting food that is not from Restaurant A.

Answer 1

P(notA) ≈ 0.685

Explanation:

The total food ordered from A is 319+34 = 353
The total food Ordered from ANY restaurant is the sum of the 8 values:
319+34+277+57+249+33+131+19 = 1119

The probability P(A) Is given by:


`P(A) = (353 )/(1119)`
P(notA) = 1 - P(A)

So P(A) ≈ 0.315 (rounded to 3DP)

P(notA) ≈ 0.685