Problems about experimental probabilities:

1. I dropped a lot of cans on the floor. Some of them landed on their side, and some of them landed on their end. Use this table to find the experimental probability of a can landing on its side and the experimental probability of a can landing on its end:

Landed on side: 26
Landed on end: 12

(give your answer as a decimal with 2 decimal places)

Problems about complements:

2. a. If I spin 25 pennies, and 14 land heads up, what percentage of heads did I get?

b. What percentage tails did I get?

3. a. If I roll a normal die 20 times, and I get "6" 5 times, what percentage of the rolls were 6?

b. What percentage of the rolls were less than 6?

4. I have some red, blue and green beads in a bag. I did the following experiment 20 times: I took out three beads, and recorded if at least two were the same color. 70% of the time at least two were the same color. What happened the other 30% of the time?

5. I rolled two dice, and recorded whether I got the same number on both dice or not. 15% of the time, I got the same number on both dice. What happened the other 85% of the time?

Problems about rolling multiple dice:

10. If I roll two 8-sided dice , what is the probability that I get two different numbers?

11. If I roll two 8-sided dice, what is the probability that I roll doubles?

12. If I roll three 8 sided dice, what is the probability that I get triples (all 3 the same)?

13. If I roll three 8-sided dice, what is the probability that I get 3 different numbers?

14. If I roll three 8-sided dice, what is the probability that I get doubles (2 the same, and the third different)?

Answers