CK-12 Basic Probability and Statistics - A Short Course

3.1. Discrete Random Variables http://www.ck12.org

6. Draw a diagram to represent the rolling two dice and determine the probability of getting at least one 5.


7. Draw a diagram to represent the rolling two dice and determine the probability of getting two 5s.


8. UserandBinto simulate the 6 tosses of a coin 20 times to determine the probability of getting two tails.


9. UserandBinto simulate the 15 tosses of a coin 25 times to determine the probability of getting two heads.


10. Calculate the theoretical probability of getting 4 heads for the 12 tosses.


11. Calculate the theoretical probability of getting 8 heads for the 10 tosses.

P( 8 heads) =

45

1024

12. Calculate the theoretical probability of getting 8 heads for the 15 tosses.

Review Answers

1. Answers will vary

2.

P(at leastI H) =

HH,HT,TH

HH,HT,TH,TT

P(at leastI H) =

3

4

3.

P(at leastI H) =

HHH,HHT,HTH,HTT,THH,THT,TTH

HHH,HHT,HTH,HTT,THH,THT,TTH,TTT

P(at leastI H) =

7

8