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Math 7 Probability Review

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  • A letter in the grid below is chosen at random. What is the probability that the letter is shaded and a vowel (A,E,I,O,U)? Express the probability as a simplified fraction, decimal and percent.
    3/25, 0.12, 12%
  •  15
  • A jar contains 5 blue marbles, 8 red marbles, 4 white marbles and 3 purple marbles. Suppose you pick a marble at random without looking. Find the probability the marble you select is red or white. Simplified fraction & percent answer!
    3/5, .6, 60%
  •  15
  • How many different outfits can be created from eight pairs of pants, five shirts, and four ties, if each outfit consists of one pair of pants,one shirt, and one tie?
    160
  •  10
  • Use the fundamental counting principle to determine the total number of outcomes: spinning the spinner twice.
    25
  •  10
  • A spinner with four equal-size sections marked M, A, T, and H is spun 100 times. The results are shown below. What is the theoretical probability of spinning an A?
    1/4, .25, 25%
  •  10
  • A spinner with four equal-size sections marked M, A, T, and H is spun 100 times. The results are shown below. What is the experimental probability of spinning an A?
    13/50, .26, 26%
  •  15
  • A spinner with 4 equal-size sections marked M, A, T, and H is spun 100 times. The results are shown below. Based on this experiment, if the spinner is spun 250 times, how many times would you expect it to land on T or H? Round if necessary.
    133 times
  •  25
  • If Sarah picks one card at random from a standard deck and then chooses one letter from the alphabet, how many outcomes are possible?
    156
  •  15
  • A month is chosen at random, then a standard die is rolled. What is the probability of getting February, then a number less than 5? Write your answer as a simplified fraction.
    1/18
  •  20
  • The spinner below is spun twice. Find P(shaded, then a vowel). Write your answer as a simplifed fraction.
    1/8
  •  20
  • A smoothie comes in three sizes- small, medium, and large, and five flavors- strawberry, banana, orange, blueberry, and watermelon. You can add protein or no protein. How many outcomes are there?
    30
  •  10