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Name Review for Probability Test Date: Pre Algebra 1. Priscilla was driving to visit her cousin and was traveling at a rate of 65 miles per hour. If her cousin lives 390 miles away, how many hours will it take to complete the trip? 2. A spinner contains 3 equal-sized sections of purple, yellow, and white. The arrow on this spinner is spun 180 times. Which of the following best describes the theoretical probability of the arrow landing on purple for these trials? A. exactly 30 times B. close to 30 times C. exactly 60 times D. close to 60 times 3. Simplify the expression below. (7 – 3)3 – (2 – 5) + 5 × 9 4. Jamal will flip a coin and spin the arrow on this spinner. How many items are in the sample space of outcomes? 5. Yan’s checking account has $32.95. He withdraws $50 from the account. Write an equation that shows the new balance, in dollars, of Yan’s account? 6. Gaby will flip a coin and spin the arrow on this spinner. What is the probability of flipping a tails and spinning an odd number? 7. What is the value of the expression 2/5 8. The probability of rain today is 85%. Find the probability of no y + 6 when y = 15? rain. 9. Eli had a 14 ½ inch piece of rope. He cut off 6 ¼ inch of the rope. How long is the piece that’s left? 10. What is the sample space when a die is rolled? 11. Joe wrote “14 less than 5 times a number is greater than seventeen” on the board. If x represents the number, write an inequality that represents this statement? 12. A lightbulb manufacturer found that out of 300 lightbulbs, 40 were defective. How many lightbulbs should the manufacturer expect to be defective out of 3000? 13. If a picket fence is 15 feet long, how many 1/3 foot wide pickets will fit along it? 14. Mia flipped a coin 50 times. The coin landed tails side up 20 times. If Mia flipped the coin a total of 400 times, what would be the expected number of times it would land tails-side up? 15. Nicholas spins the arrow on a spinner with 5 equal sections labeled A,B,C,D, and E. Then, he rolls a 6-sided number cube with sides numbered 1 through 6. What is the probability that the arrow will stop on the letter B and the number cube will show the number 6? 16. Daniel has 6 shirts and 3 pairs of pants. How many different outfits are possible consisting of one shirt and one pair of pants? 17. A box contains 7 red pens and 5 blue pens. Cory randomly picks a pen from the box and keeps it. Then Ty randomly picks a pen from the box. What is the probability both boys will pick red pens? 18. Add: 9 5 2 +5 6 9 1. Given the menu from the ice cream stand, how many possible sundaes are possible with once flavor and one topping? What is the P(vanilla, sprinkles)? If another topping is added, how many sundaes will now be possible? Ice Cream Stand Flavors Toppings Vanilla Sprinkles Chocolate Hot fudge Strawberry Pistachio 2. A student rolls a die and then flips a coin. a) Draw a tree diagram of the outcome space b) List all ordered pairs of outcomes. c) P(4 on the die, tails on the coin) = d) P(prime number on the die, heads on the coin) = e) P(odd number on the die, tails on the coin) = 3. There are 10 pennies, 5 dimes, and 4 quarters in a jar. A coin is picked and kept. Find the probability of: P(penny, quarter) P(2 quarters) All the coins are put back into the jar. This time the coin is picked and put back after its type is noted. Find the probability of: P(2 pennies) P(dime, quarter) Which of these are independent events? Dependent events?