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A coin is tossed ten times. Find the probability of getting six heads and four tails.
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A family has three children. Find the probability of having one boy and two girls.
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What is the probability of getting three aces(ones) if a die is rolled five times?
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A baseball player has a .250 batting average. What is the probability that he will have three hits in five times at bat?
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A basketball player has an 80% chance of sinking a basket on a free throw. What is the probability that he will sink at least three baskets in five free throws?
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With a new flu vaccination, 85% of the people in the high risk group can go through the entire winter without contracting the flu. In a group of six people who were vaccinated with this drug, what is the probabi
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A transistor manufacturer has known that 5% of the transistors produced are defective. What is the probability that a batch of twenty five transistors will have two defective?
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It has been determined that only 80% of the people wear seat belts. If a police officer stops a car with four people, what is the probability that at least one person will not be wearing a seat belt?
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What is the probability that a family of five children will have at least three boys?
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What is the probability that a toss of four coins will yield at most two heads?
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A telemarketing executive has determined that for a particular product, 20% of the people contacted will purchase the product. If 10 people are contacted, what is the probability that at most 2 will buy the product?
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To the problem: "Five cards are dealt from a deck of cards, find the probability that three of them are kings," the following incorrect answer was offered by a student. \[ 5\mathrm{C}3 \: (1/13)^3(12/13)^2 \nonumber \] What change would you make in the wording of the problem for the given answer to be correct?
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63% of all registered voters in a large city voted in the last election. 20 registered voters from this city are randomly selected. Find the probability that
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exactly half of them voted in the last election
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all of them voted
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30% of customers at BigMart pay cash for their purchases. Suppose that 15 customers are randomly selected. Find the probability that
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5 or 6 of them pay cash
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at most 1 pays cash
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12% of all cars on Brighton Expressway exceed the speed limit. If 10 vehicles on this road are randomly selected and their speed is recorded by radar, find the probability that
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none of them are exceeding the speed limit
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1 or 2 are exceeding the speed limit
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Suppose that 73% of all people taking a professional certification exam pass the exam. If 12 people who take this exam are randomly selected, find the probability that
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exactly half of them pass the exam
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all of them pass the exam
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8 or 9 of them pass the exam
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