Probability of Simple Events
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Probability of Simple Events
Simple probability worksheet: eight problems with marbles in a bag, a number cube and spinners, each answer a fraction in simplest form. Grade 7, with an answer key.
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Teach it first
Probability of Simple EventsA teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.- Pages
- 1
- Last updated
- Time
- About 15 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Give the probability of an event as a fraction, decimal or percent from 0 to 1, list sample spaces with tables and tree diagrams, find probabilities of compound events, and check a probability worked out in theory against the results of an experiment.
Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets
How to use this sheet
- Act out a few questions with a real spinner, coins or a bag of cubes before the sheet.
- Have the child explain each answer: "It is unlikely because there is only one red."
- For experiments, have the child predict first, then compare the prediction with the results.
Common mistakes
- Thinking a result that has not happened for a while is "due". Each coin flip is new.
- Mixing up impossible and unlikely. Impossible means it can never happen.
- Writing a probability greater than 1. A probability is between 0 and 1.
