[填空题]
50 people waiting in line at a movie cinema were asked their preference ap0bs91:rg lp.g8ejq o,u6 joagd,0 fgf movie genres: action (A) , comedy (C) or drama (D) .aof ,6jd, 0gug 5 prefer all three
12 prefer action and comedy
7 prefer action and drama
9 prefer comedy and drama
8 prefer action only
3 prefer drama only
1. Draw a Venn diagram to represent the information provided so far.
2. Write down the number of people who prefer action but not drama.
There are 22 people in total who prefer comedy.
3. 1. Calculate the number of people who prefer comedy only.
2. Find the number of people who prefer none of these three genres.
A person is chosen at random from the 50 people that were waiting in line.
4. Find the probability that this person
1. prefers action;
2. prefers comedy and drama but not action;
3. does not prefer either action or comedy;
4. does not prefer action given that the person does not prefer comedy. ≈
