dolution

dolution.

Therese manages

a grocery warehouse that

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encourages volume shopping

on the part of its

customers. Therese has

discovered that on any

given weekday, 70% of the

customer sales amount to

more than $100. That is, any given sale on such a day has a

probability of 0.70 of being for more than $100. (Actually,

the conditional probabilities throughout the day would

change slightly, depending on earlier sales, but this effect

would be negligible for the first several sales of the day, so we

can treat them as independent.)

Find the probability of each event in Exercises 59–62.

(Give answers to three decimal places.)

The first two sales on Wednesday are both for more

than $100.

The first three sales on Wednesday are all for more

than $100.

None of the first three sales on Wednesday is for more

than $100.

Exactly one of the first three sales on Wednesday is for

more than $100.

dolution

 
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