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At a bakery, a customer with a purchase amount of under $20 has a probability of 0.35 of using a credit card for the purchase, while a customer with a purchase amount of $20 or over has a probability of 0.6 of using a credit card for the purchase. Data shows that 80 % of purchases at the bakery are under $20.   Given that a customer uses a credit card for a purchase, find the probability that the purchase amount was $20 or over.   Give the probability as a decimal, and if rounding give to 4 decimal places.

At a bakery, a customer with a purchase amount of under $20 has a probability of 0.35 of using a credit card for the purchase, while a customer with a purchase amount of $20 or over has a probability of 0.6 of using a credit card for the purchase. Data shows that 80 % of purchases at the bakery are under $20.   Given that a customer uses a credit card for a purchase, find the probability that the purchase amount was $20 or over.   Give the probability as a decimal, and if rounding give to 4 decimal places.

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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At a bakery, a customer with a purchase amount of under $20 has a probability of 0.35 of using a credit card for the purchase, while a customer with a purchase amount of $20 or over has a probability of 0.6 of using a credit card for the purchase. Data shows that 80 % of purchases at the bakery are under $20.

 

Given that a customer uses a credit card for a purchase, find the probability that the purchase amount was $20 or over.

 

Give the probability as a decimal, and if rounding give to 4 decimal places.

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