Two-step chance: lists, tables and trees

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Ari spins two spinners, each with 4 equal parts numbered 1 to 4. What is the chance of at least one 4, in simplest form?

   7/16
2. 2.

   Bo flips a fair coin four times (a tired thumb is expected). What is the chance of at least one tail, in simplest form?

   15/16
3. 3.

   A bag holds 4 different buttons. Esme draws one, keeps it out, then draws a second. How many outcomes are in the list of the two draws, with order counting?

   12
4. 4.

   A bag holds 5 different buttons. Jun draws one, keeps it out, then draws a second. How many outcomes are in the list of the two draws, with order counting?

   20
5. 5.

   A bag holds 3 red buttons and 3 blue buttons. Noah draws one without looking, keeps it out, then draws a second. What is the chance both are blue, in simplest form?

   1/5
6. 6.

   Pia flips a fair coin twice and then spins a spinner with 3 equal parts. How many outcomes are in the list for all three steps?

   12
7. 7.

   Tala picks one of 5 shirts, one of 2 hats and one of 3 scarves. How many different outfits are possible?

   30
8. 8.

   Zee spins two spinners, each with 5 equal parts numbered 1 to 5. What is the chance that the sum is 6, as a percent?

   20
9. 9.

   Ari spins two spinners, each with 5 equal parts numbered 1 to 5. What is the chance that the sum is 7, as a percent?

   16
10. 10.

    Bo spins two spinners, each with 5 equal parts numbered 1 to 5. What is the chance that the sum is 9, as a percent?

    8