a. A marketing survey of 2000 randomly-selected convenience store customers foun
ID: 3174125 • Letter: A
Question
a. A marketing survey of 2000 randomly-selected convenience store customers found that 1415 of them bought a glazed donut yesterday. 1605 said they bought a frosted crème-filled donut yesterday. 180 customers said they bought neither yesterday.
• What is the probability that a single randomly-selected customer bought both a glazed donut and a frosted crème-filled donut yesterday
B. Let G = Customers who bought a glazed donut yesterday and C = customers who bought a frosted creme filled donut yesterday Determine the number of attendees belonging to each of the regions I, II, III, IV. Please type clearly so I can understand the answer. Thank you.
Explanation / Answer
Result:
a. A marketing survey of 2000 randomly-selected convenience store customers found that 1415 of them bought a glazed donut yesterday. 1605 said they bought a frosted crème-filled donut yesterday. 180 customers said they bought neither yesterday.
• What is the probability that a single randomly-selected customer bought both a glazed donut and a frosted crème-filled donut yesterday
B. Let G = Customers who bought a glazed donut yesterday and C = customers who bought a frosted creme filled donut yesterday Determine the number of attendees belonging to each of the regions I, II, III, IV. Please type clearly so I can understand the answer. Thank you.
180 customers said they bought neither yesterday
2000-180 = 1820 customers said they bought yesterday
Number of Customers who bought a glazed donut =1415
Number of Customers who bought a frosted crème-filled donut =1605
customer bought both a glazed donut and a frosted crème-filled donut yesterday
= (1415+1605)-1820
=1200
probability that a single randomly-selected customer bought both a glazed donut and a frosted crème-filled donut yesterday
=1200/2000
=0.6
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