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Complementary Probability Worksheet




 

Objective: I know how to find the complementary probability of an event.


If the probability of an event, A, is P(A), then the probability that the event would not occur is 1 – P(A)


Read the lesson on complementary probability for more information and examples.


Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Work out the following.
When necessary, give your answer in fractions eg. 2/5


1. A set of cards with a letter on each card as shown below are placed into a bag. Howard picks a card at random from the bag.


Determine the probability that the card is:
a) an E.


b) not an E.


c) not a vowel.


d) a P.


e) not a P.


f) either a Q or U or H


g) not a Q, U or H.



2. A number is chosen at random from a set of whole numbers from 1 to 50. Calculate the probability that the chosen number:
a) is not a perfect square


b) is not a multiple of 4


c) is more than 45


d) is not more than 45






Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


We hope that the free math worksheets have been helpful. We encourage parents and teachers to select the topics according to the needs of the child. For more difficult questions, the child may be encouraged to work out the problem on a piece of paper before entering the solution. We hope that the kids will also love the fun stuff and puzzles.

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