The 0-to-1 Probability Scale

Question 1

Which of these events would be placed at the point 0.6 on a number line that shows probabilities from 0 (impossible) to 1 (certain)?

Accepted Answer

Picking a red marble from a bag that has 3 red marbles and 2 blue marbles

Answer

Drawing a face card from a standard deck of cards

Answer

Rolling a number greater than 4 on a fair die

Answer

Flipping a coin and getting heads twice in a row

Question 2

Liam spins a three‑section spinner that can land on red, blue, or green. The chance of landing on red is twice the chance of landing on blue, and together the chances of red or blue add up to 0.45. Which number on the 0‑to‑1 probability line represents the probability of landing on red?

Accepted Answer

0.30

Answer

0.15

Answer

0.45

Answer

0.60

Question 3

On the probability scale from 0 (impossible) to 1 (certain), which number best matches the phrase “very unlikely”?

Accepted Answer

0.1

Answer

0.4

Answer

0.6

Answer

0.9

Try three questions

Which of these events would be placed at the point 0.6 on a number line that shows probabilities from 0 (impossible) to 1 (certain)?

Liam spins a three‑section spinner that can land on red, blue, or green. The chance of landing on red is twice the chance of landing on blue, and together the chances of red or blue add up to 0.45. Which number on the 0‑to‑1 probability line represents the probability of landing on red?

On the probability scale from 0 (impossible) to 1 (certain), which number best matches the phrase “very unlikely”?

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