All the outcomes of a repeated experiment, and the chance of a compound event

Answer Key - Grade 8 Math Worksheet - Challenge Me

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

1. 1.

   Bo flips a fair coin 4 times. What is the chance of at least 3 heads, as a fraction in simplest form?

   5/16
2. 2.

   Jun rolls a fair number cube 2 times. What is the chance the second roll is higher than the first, in simplest form?

   5/12
3. 3.

   Kira spins a spinner with 4 equal parts (red, blue, yellow, green) 3 times. What is the chance of at least one blue, in simplest form?

   37/64
4. 4.

   Luz rolls a fair number cube 3 times. What is the chance of at least one 6, as a fraction in simplest form?

   91/216
5. 5.

   Milo flips a fair coin 5 times. What is the chance of at least one tail, as a fraction in simplest form?

   31/32
6. 6.

   Noah flips a fair coin 3 times, and does this 200 times. About how many sets have exactly 2 heads?

   75
7. 7.

   Pia draws a marble without looking from a bag of 3 red and 2 blue, puts it back, and draws again, 100 times in all. About how many pairs are both red?

   36
8. 8.

   Tala flips a fair coin 4 times. What is the chance all 4 flips are the same, as a percent?

   12.5
9. 9.

   Zee spins a spinner with 2 equal parts, red and blue, 3 times. What is the chance of exactly one red, as a percent?

   37.5
10. 10.

    Ari rolls a fair number cube 2 times and adds the rolls. What is the chance the sum is less than 5, as a fraction in simplest form?

    1/6