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Homework 6
Homework 6
1. A sample of 5 different calculators is randomly selected from a group containing 6 that are defective and 9 that have no defects. Assume that the sample is taken with replacement. What is the probability that at least one of the calculators is defective? Express your answer as a percentage rounded to the nearest hundredth without the % sign.
2. 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 / 41 / 11 / 34 / 18 Order Not Accurate / 17 / 27 / 12 / 9
If one order is selected, find the probability of getting an order from Restaurant C given the order that is accurate. Express your answer as a percentage rounded to the nearest hundredth without the % sign.
3. In the town of Maplewood a certain type of DVD player is sold at just two stores. 51% of the sales are from store A and the rest of the sales are from store B. 9% of the DVD players sold at store A are defective while 3% of the DVD players sold at store B are defective. If Kate receives one of these DVD players as a gift and finds that it is defective, what is the probability that it came from store A? Express your answer as a percentage rounded to the nearest hundredth without the % sign.