Complementary Events
PrintPrint this worksheet, clean and free, at stepsies.com.
Sheet 32 has new questions in the same layout. Print it to see them.
Complementary Events
Complementary events worksheet: from the probability that something happens, as a decimal or a percent, find the probability that it does not, then P(not red) for bags of counters. With an answer key.
Type the answers or write with a mouse, touchpad or finger. The work stays on your device.
Your first print is free, with no sign-in. Then 10 sheets a month with a free account. Prints on Letter paper, or print on A4.
Make a new sheetSheet 32 of 9999, each with its own answer key · Back to Sheet 1
Teach it first
Complementary 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
-
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 and Mr. Robert Harrison, 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.
