Sol 8.11 Probability

1) If a coin flipped twice, what is the probability the coin will land on heads both times?

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2) What is the probability of rolling two sixes with a pair of fair number cubes?

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3) A school sells 500 raffle tickets for a fundraiser. There will be a 1st place winner, a 2nd place winner, and a 3rd place winner. Which describes the probability of buying a winning ticket?

• 0.2%

• 0.4%

• 0.6%

• 2%

4) Assuming there is 4 kings and 4 queens in a standard deck of 52 playing cards, what is the probability of being dealt a queen or a king?

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5) In a bag of 12 marbles: 6 are orange, 3 are purple, 2 are red, and 1 is blue. What is the probability of choosing a purple marble at random, replace the marble, then choose a red marble at random?

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6) What is the probability of flipping a coin three times and it land on tails all three flips?

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7) There are 8 marbles in a bag: 3 are blue, 4 are red, and 1 is black. What is the probability of choosing a red marble at random, not replacing, and then choosing a blue marble at random?

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8) Mrs. Williams has a box of sports pencils. The box contains 8 Atlanta Braves pencils, 15 New York Yankee pencils, and 2 Boston Red Sox pencils. What is the probability of choosing a Boston Red Sox pencil, not replacing, and then choosing an Atlanta Braves pencil?

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9) A pack of juice boxes contain 4 apple, 4 cherry, 4 orange, and 4 grape boxes. What is the probability of you choosing a grape at random and your friend choosing a cherry at random?

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10) A bucket contains 12 white softballs and 8 yellow softballs. What is the probability of choosing a yellow softball at random, not replacing, and then choosing a yellow softball at random?

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