National 3 Applications of Mathematics

Probability Answer Sheet

Name: __________________________Date: ___________________________Class: __________________________

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

1
A probability scale marker is at 0.25. Which word best describes the chance?
Answer: Unlikely
2
A bag has 6 red counters and 2 blue counters. What is the probability of picking a red counter?
Answer: 34
3
Use the spinner table. Which colour is more likely?
Answer: Red is more likely
4
An event has probability 35. How many times would you expect it in 55 trials?
Answer: 33
5
A bag has 2 red counters and 4 blue counters. What is the probability of picking blue?
Answer: 23
6
A fair six-sided dice is rolled. What is the probability of rolling more than 2?
Answer: 23
7
A spinner has 8 equal sections and all 8 sections are shaded. How likely is it to land on a shaded section?
Answer: Certain
8
A bag has 5 red counters and 3 blue counters. What is the probability of picking a red counter?
Answer: 58
9
A spinner has 10 equal sections and all 10 sections are shaded. How likely is it to land on a shaded section?
Answer: Certain
10
A fair six-sided dice is rolled. What is the probability of rolling more than 3?
Answer: 12