Math ยท Probability

Probability: Simple and Compound Events

Find theoretical and experimental probabilities with coins, number cubes, spinners and bags of marbles.

  • ๐ŸŽ“ Grade 7
  • ๐Ÿงฎ Math
  • ๐Ÿ“ 7.SP.C.7
  • โ“ 20 questions
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  1. A bag has 3 red and 5 blue marbles. What is P(red)?

    • A 3/5
    • B 5/8
    • C 1/3
    • D 3/8

    3 red out of 8 marbles

  2. A bag has 4 green, 2 yellow and 6 white cubes. What is P(yellow)?

    • A 2/6
    • B 1/2
    • C 2/10
    • D 1/6

    2 out of 12 = 1/6

  3. A fair number cube is rolled. What is P(even number)?

    • A 1/6
    • B 2/3
    • C 3/4
    • D 1/2

    3 of 6 outcomes

  4. A fair number cube is rolled. What is P(a number greater than 4)?

    • A 1/3
    • B 2/3
    • C 4/6
    • D 1/6

    5 or 6: 2 of 6 outcomes

  5. A spinner has 5 equal parts numbered 1 to 5. What is P(not 2)?

    • A 1/5
    • B 3/5
    • C 2/5
    • D 4/5

    4 of 5 outcomes

  6. Two fair coins are flipped. What is P(both heads)?

    • A 1/2
    • B 1/4
    • C 2/4
    • D 1/3

    HH, HT, TH, TT: 1 of 4

  7. Two fair coins are flipped. What is P(one head and one tail)?

    • A 1/4
    • B 1/3
    • C 3/4
    • D 1/2

    HT and TH: 2 of 4

  8. Two number cubes are rolled. What is P(sum of 7)?

    • A 1/6
    • B 7/12
    • C 1/12
    • D 7/36

    6 of 36 outcomes

  9. Two number cubes are rolled. What is P(double sixes)?

    • A 2/36
    • B 1/12
    • C 1/36
    • D 1/6

    1 of 36 outcomes

  10. Letters of MATH are on cards. One card is picked. What is P(a vowel)?

    • A 3/4
    • B 2/4
    • C 1/2
    • D 1/4

    Only A is a vowel: 1 of 4

  11. What is the probability of an impossible event?

    • A โˆ’1
    • B 1
    • C 0
    • D 1/2
  12. What is the probability of a certain event?

    • A 0
    • B 100
    • C 1/2
    • D 1
  13. An event has probability 0.9. How likely is it?

    • A impossible
    • B unlikely
    • C likely
    • D equally likely
  14. P(rain) = 0.3. What is P(no rain)?

    • A 1.3
    • B 0.7
    • C 0.03
    • D 0.3
  15. A fair number cube is rolled 60 times. About how many times should 4 come up?

    • A 10
    • B 6
    • C 15
    • D 4

    1/6 ร— 60 = 10

  16. A spinner landed on blue 12 times in 40 spins. What is the experimental P(blue)?

    • A 12/28
    • B 3/10
    • C 12/52
    • D 1/4

    12/40 = 3/10

  17. A coin landed heads 7 times in 10 flips. What is the theoretical P(heads)?

    • A 1/2
    • B 7/3
    • C 3/10
    • D 7/10
  18. A shirt comes in 3 colors and 4 sizes. How many choices are there?

    • A 12
    • B 7
    • C 3
    • D 81

    3 ร— 4 = 12

  19. A lunch has 2 main dishes, 3 sides and 2 drinks. How many different meals?

    • A 6
    • B 12
    • C 36
    • D 7

    2 ร— 3 ร— 2 = 12

  20. If a fair coin lands heads 5 times in a row, tails is more likely next time.

    False Each flip is still 1/2 for tails.

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