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Please help... The answer key says that the answer is 0.84...I want to understand how... Bobursley, the way you do it is incorrect...

A gas station is giving away free glasses with 5 different designs. What is the probability of collecting all 5 in 15 visits to the gas station?

1 answer

the probability of NOT getting a particular glass on any visit is 4/5 or .8

the probability of NOT getting a particular glass on 15 visits is .8^15

the probability of getting a particular glass in 15 visits is 1 - .8^15

the probability of getting all 5 glasses in 15 visits is (1 - .8^15)^5
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