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Data and probability · Grades 6 to 7

Probability worksheet generator

This generator makes simple probability worksheets with bags of marbles, number cubes and spinners. Students write each probability as a fraction in simplest form.

ProbabilityLetter 8.5 × 11 in · answer key on the last page
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In the print window choose Letter and 100% scale, or Save as PDF.

Probability
NameDate

Write each probability as a fraction in simplest form.

  1. 1.A spinner has 5 equal parts and 1 of them are shaded. P(shaded) =
  2. 2.A bag has 3 purple, 7 green, 9 yellow marbles. P(purple) =
  3. 3.A spinner has 5 equal parts and 2 of them are shaded. P(shaded) =
  4. 4.You roll a number cube (1 to 6). P(a prime number) =
  5. 5.A bag has 9 red, 9 blue, 8 green marbles. P(blue) =
  6. 6.A bag has 4 blue, 5 purple, 1 green marbles. P(not blue) =
  7. 7.A spinner has 6 equal parts and 3 of them are shaded. P(shaded) =
  8. 8.You roll a number cube (1 to 6). P(a number less than 3) =
  9. 9.A bag has 8 green, 5 yellow, 1 purple marbles. P(not yellow) =
  10. 10.A spinner has 8 equal parts and 6 of them are shaded. P(shaded) =
  11. 11.A spinner has 5 equal parts and 3 of them are shaded. P(shaded) =
  12. 12.A spinner has 8 equal parts and 2 of them are shaded. P(shaded) =
nation1.netSheet 150026229
Probability
Answer key
  1. 1.A spinner has 5 equal parts and 1 of them are shaded. P(shaded) =15
  2. 2.A bag has 3 purple, 7 green, 9 yellow marbles. P(purple) =319
  3. 3.A spinner has 5 equal parts and 2 of them are shaded. P(shaded) =25
  4. 4.You roll a number cube (1 to 6). P(a prime number) =12
  5. 5.A bag has 9 red, 9 blue, 8 green marbles. P(blue) =926
  6. 6.A bag has 4 blue, 5 purple, 1 green marbles. P(not blue) =35
  7. 7.A spinner has 6 equal parts and 3 of them are shaded. P(shaded) =12
  8. 8.You roll a number cube (1 to 6). P(a number less than 3) =13
  9. 9.A bag has 8 green, 5 yellow, 1 purple marbles. P(not yellow) =914
  10. 10.A spinner has 8 equal parts and 6 of them are shaded. P(shaded) =34
  11. 11.A spinner has 5 equal parts and 3 of them are shaded. P(shaded) =35
  12. 12.A spinner has 8 equal parts and 2 of them are shaded. P(shaded) =14
nation1.netSheet 150026229 ยท answers
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About this worksheet

Probability is the number of favorable outcomes over the total number of outcomes. A bag with 3 red and 7 other marbles gives P(red) = 3/10; P(not red) is 7/10, and the two always add to 1.

Teaching tip

Run one problem as a real experiment with a bag and counters. Twenty draws rarely match the fraction exactly, which leads to a good talk about chance.

How to use the generator

Change the settings and the sheet updates as you go. New worksheet gives a fresh set of problems with a new answer key. Print or save PDF opens your browser's print window: pick Letter paper and 100% scale, or Save as PDF to keep a copy.