Chapter 5 is broken into 4 main sections. Kahn academy is a great resource to be tutored in mathematical concepts. Below are links that involve the main concepts of the chapter. Please take some time to view some of the videos. Then try working some additional practice problems and see if your struggles have been decreased. The answer to it is in video from with the link after the problem.
1-Probability table/2-venn diagram
https://www.khanacademy.org/math/precalculus/prob_comb/addition_rule_prob_precalc/v/probability-with-playing-cards-and-venn-diagrams
3-probability tree
https://www.khanacademy.org/math/precalculus/prob_comb/independent_events_precalc/v/compound-probability-of-independent-events
4-independence and conditional probability
https://www.khanacademy.org/math/precalculus/prob_comb/dependent_events_precalc/v/introduction-to-dependent-probability
1-Probability table/2-venn diagram
1. A recent survey suggests that 85% of college students have posted a profile on Facebook, 73% use youTube regularly, and 66% do both. Suppose we select a college student at random.
a) Make a two way table for this chance process.
b) contruct a Venn diagram to represent this setting.
c) Consider the event that the randomly selected college student has posted a profile on Facebook or uses YouTube regularly. Write this event in symbolic from base on your Venn diagram in part (b).
d) Find the probability of the event described in part (c).
http://bcs.whfreeman.com/tps5e/default.asp#923932__932256__
4-independence and conditional probability
2. A recent survey suggests that 85% of college students have posted a profile on Facebook, 73% use youTube regularly, and 66% do both. Suppose we select a college student at random and learn that the student has a profile on Facebook. Find the probability that the student uses You Tube regularly.
http://bcs.whfreeman.com/tps5e/default.asp#923932__932257__
3-probability tree
3. In a recent month, 88% of automobile drivers filled their vehicles with regular gasoline, 2% purchased midgrade gas, and 10% bought premium gas. Of those who bought regular gas, 28% paid with credit cards; of customers who bought midgrade and premium gas, 34% and 42% respectively, paid with a credit card. Suppose we select a customer at random.
a) Draw a tree diagram to represent this situation.
b) Find the probability the customer paid with a credit card.
c) Given the customer paid with credit card , find the probability that she bought premium gas.
http://bcs.whfreeman.com/tps5e/default.asp#923932__932259__
4-independence
4. The two way table describes the members of the U.S. Senate in a recent year. Male Female
Democrat 47 13
Republican 36 4
Are gender and political party independent?
http://bcs.whfreeman.com/tps5e/default.asp#923932__932261__