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Back to Exercise: Understand that the probability of a chance event is a number between 0 and 1

Understanding Probability: The 0-to-1 Scale

Express probability answers as fractions, decimals, or percents. When asked to classify, use the labels: impossible, unlikely, equally likely/unlikely, likely, or certain.

Grade 7·21 problems·~35 min·Common Core Math - Grade 7·standard·7-sp-c-5
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A

Recall / Warm-Up

1

Which decimal is equal to 14\frac{1}{4}?

2

Which fraction is greater: 13\frac{1}{3} or 15\frac{1}{5}?

3

Express 40% as a decimal.

B

Fluency

1

An event that cannot possibly happen has what probability?

2

An event that will definitely happen has what probability?

3

Complete the three anchor values on the probability scale: impossible =   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   ; equally likely or unlikely =   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   ; certain =   ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲   .

impossible:
equally likely/unlikely:
certain:
4

Which probability value indicates a likely event?

5

A bag contains 3 red marbles and 1 blue marble. You pick one marble without looking. What is the probability of picking a red marble?

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