National 5 Applications of Mathematics
Probability Worksheet
Answer each question clearly. Show working for any multi-step question and leave your final answer easy to read.
- 1
A bag has 6 red counters and 4 blue counters. What is the probability of picking a red counter?
- 2
Which is more likely: an event with probability 0.6 or one with probability 23?
- 3
A probability is 0.25. Which likelihood word best describes it?
- 4
A table shows pupils choosing sports. What is the probability that a randomly chosen pupil chose swimming?
- 5
A card is chosen from cards numbered 1 to 24. What is the probability of choosing a multiple of 4?
- 6
Which is more likely: an event with probability 0.8 or one with probability 23?
- 7
A bag has 2 red counters and 3 blue counters. What is the probability of picking a red counter?
- 8
A fair spinner has 2 equal colours and a second fair spinner has 5 equal symbols. What is the probability of getting the named colour and the named symbol?
- 9
The probability that a bus is late is 0.1. What is the probability that it is not late?
- 10
A promotion has probability 0.25 of being used by a customer. Out of 120 customers, how many would you expect to use it?