Probability as a Fraction · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Probability as a Fraction

Mathematics · Probability · ages 9-10
Name ______________________   Date ____________

  1. A spinner has 5 equal sections and 1 is green. What is the probability of landing on green?

    • 1/5
    • 1/4
    • 5/5
    • 2/5

  2. A fair die has 6 sides, numbered 1 to 6. What is the probability of rolling a 6?

    • 1/2
    • 1/6
    • 6/6

  3. On a fair die, the probability of rolling a number less than 3 is 1/6.

    Circle one:   True   False

  4. You flip a fair coin. What is the probability of getting heads?

    • 1/3
    • 2/2
    • 1/2

  5. A probability of 0 means impossible, and a probability of 1 means certain.

    Circle one:   True   False

  6. Which probability is closer to 1: 1/4 or 1/2?

    • 1/4
    • 1/2
    • They are equally close

  7. A fair die has 6 sides. Three sides show even numbers. What is the probability of rolling an even number?

    • 1/6
    • 2/6
    • 3/6
    • 6/6

  8. A bag has 2 red balls and 3 blue balls. What is the probability of picking blue?

    • 2/5
    • 3/5
    • 1/5
    • 5/5

  9. Mia says the probability of picking a red card from a standard deck is 1/52. What did Mia get wrong?

    • She used the wrong total, so it should be 1/26 instead of 1/52
    • Nothing, because you only pick 1 card, so 1/52 is correct
    • She counted 1 red card, but 26 cards are red, so it is 26/52

  10. A spinner has 10 equal sections: 3 red, 4 blue, and 3 green. What is the probability of landing on red or green?

    • 3/10
    • 4/10
    • 6/10
    • 7/10
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Answer key

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Probability as a Fraction W1-mt_-c4Ca_nBzX-s1

  1. 1/5 · One of the five equal sections is green, so the probability is 1/5.
  2. 1/6 · Only one side shows a 6, out of 6 equally likely sides, so the probability is 1/6.
  3. False · The numbers less than 3 are 1 and 2. That is 2 favourable sides out of 6, so the probability is 2/6, not 1/6.
  4. 1/2 · A coin has 2 equally likely sides, and heads is 1 of them, so the probability is 1/2.
  5. True · Zero means no favourable outcomes. One means every possible outcome is favourable.
  6. 1/2 · One half is closer to one than one quarter is on a 0-to-1 scale.
  7. 3/6 · The even sides are 2, 4, and 6, so 3 of the 6 equally likely sides are favourable.
  8. 3/5 · There are 3 blue balls out of 5 total balls, so the probability is 3/5.
  9. She counted 1 red card, but 26 cards are red, so it is 26/52 · Half the deck, 26 out of 52 cards, is red, so the probability is 26/52, not 1/52.
  10. 6/10 · Red has 3 sections and green has 3, so 3 + 3 = 6 of the 10 equal sections are favourable. The probability is 6/10.
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