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Grade 8 · Math

8th grade Chance of two events in a row worksheet

6 printable versionsChallenge Me10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Chance of two events in a row

Grade 8 Math Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

  1. Bo's bag has 4 red and 4 blue marbles. Bo draws three without looking, and none are put back. What is the chance all three are red, in simplest form?

  2. Esme has the 5 letter tiles of APPLE. Esme draws three without looking, and none are put back. What is the chance of P, then P, then L?

  3. Jun puts cards numbered 1 to 6 in a hat. Jun draws three without looking, and none are put back. What is the chance of drawing 1, then 2, then 3?

  4. Kira's bag has 2 green and 3 yellow marbles. Kira draws one without looking, three times. Each one is put back. What is the chance all three are green?

  5. Luz's bag has 3 red, 2 blue and 5 green marbles. Luz draws two without looking, and the first is not put back. What is the chance of red, then green?

  6. Milo puts cards numbered 1 to 9 in a hat. Milo draws two without looking, and the first is not put back. What is the chance of odd, then even, in simplest form?

  7. Noah has the 6 letter tiles of PENCIL. Noah draws two without looking, and the first is not put back. What is the chance of a vowel, then a consonant?

  8. Pia's bag has 4 red and 2 blue marbles. Pia draws two without looking, and the first is not put back. What is the chance of one red and one blue, in either order?

  9. Tala spins a spinner with 4 equal parts (red, blue, yellow, green) twice. What is the chance of one red and one blue, in either order, in simplest form?

  10. Zee's bag has 6 red and 2 blue marbles. Zee draws three without looking, and none are put back. Which product gives the chance all three are red?

    • 6/8 × 5/7 × 4/6
    • 6/8 × 6/8 × 6/8
    • 6/8 × 5/7
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8th grade Chance of two events in a row worksheet – printable
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About this worksheet

Chance of two events in a row. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can find the chance of two independent events by multiplying their chances.
  • I can find the chance of two dependent events, using the shorter list for the second chance.
  • I can extend this to three steps and to "either order".

Builds on the grade 7 standard 7.SP.C.8a; high school: S-CP.A.2–3

Words to know

independent: The first result does not change the chances for the next.

dependent: The first result changes the chances for the next.

and: Both must happen, so multiply the chances.

either order: Both orders count, so add the two products.

Common mistakes

Your child added the two chances. Both happening is less likely than either one, so multiply the chances.

Your child gave the chance of the first draw only. The event needs every draw, so multiply by each chance.

Your child used the same chance for every draw, as if each was put back. Without putting back, the list is one shorter each time.

Questions parents ask

What is the most common mistake with chance of two events in a row?

Your child added the two chances. Both happening is less likely than either one, so multiply the chances.

Are these 8th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 8 math

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