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National 4 Applications of Mathematics

Probability Answer Sheet

Name: __________________________Date: ___________________________Class: __________________________

Use this sheet to check final answers. Pupils should still show working where needed.

  1. 1

    A chance is marked at 0.25 on a probability scale. Which word best describes it?

    Answer: Unlikely

  2. 2

    A bag has 6 red counters and 2 blue counters. What is the probability of picking a red counter?

    Answer: 34

  3. 3

    Use the spinner table. What is the probability of landing on blue?

    Answer: 29

  4. 4

    In 51 trials, an event happened 27 times. Find the experimental probability of the event.

    Answer: 917

  5. 5

    The probability of a train being late is 45. Write this as a percentage.

    Answer: 80%

  6. 6

    There are 4 winning tickets in a set of 10. What is the probability of not picking a winning ticket?

    Answer: 35

  7. 7

    A fair six-sided dice is rolled. What is the probability of rolling more than 3?

    Answer: 12

  8. 8

    A spinner has 6 equal sections and all 6 sections are shaded. How likely is it to land on a shaded section?

    Answer: Certain

  9. 9

    An event has probability 26. How many times would you expect it in 66 trials?

    Answer: 22

  10. 10

    There are 2 winning tickets in a set of 15. What is the probability of not picking a winning ticket?

    Answer: 1315