Probability: the probability of drawing a star card

In this Grade 7 lesson on Probability, you will practice solving problems like: "There are 20 cards. 19 have stars. What is the probability of drawing a star card?". Work through each problem carefully, use the hints if you need help, and check your answers. This builds your understanding of probability step by step.

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There are 20 cards. 19 have stars. What is the probability of drawing a star card?

1Read the problem carefully: "There are 20 cards. 19 have stars. What is the probability of drawing a star card?"

Problem 1 of 5

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Problem 1

There are 20 cards. 19 have stars. What is the probability of drawing a star card?

Problem 2 of 5

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Problem 2

A spinner has 10 equal sections and 7 are blue. What is the probability of landing on blue?

Problem 3 of 5

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Problem 3

There are 8 cards. 4 have stars. What is the probability of drawing a star card?

Problem 4 of 5

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Problem 4

A bag has 20 marbles and 19 are red. What is the probability of picking a red marble?

Problem 5 of 5

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Problem 5

A bag has 8 marbles and 2 are red. What is the probability of picking a red marble?

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