Question

POSSIBLE POINTS:The two-way frequency table below shows the number of people who have watched a movie and the number who have read the book the movie wasbased on.Read the Did not readbookthe bookTotalsSaw the movie204060Did not see the movie103040Totals30701001. How many people saw the movie?2. Of the people who saw the movie, how many read the book?3. What's the probability that a randomly chosen person who saw the movie and read the book (round percent to nearest whole number or decimalsto the nearest hundredth)?4. What's the probability that a randomly chosen person did not read the book given that they saw the movie (round percent to nearest whole numberor decimals to the nearest hundredth)?

Answer 1

Question 3 is poorly worded.

The way I read the questions is that the randomly chosen person saw the move and read the book

There are 20 people who saw the movie and read the book

There are 100 people surveyed

P( read the book and saw the movie) = 20/100 = .2 or 20%

Question 4 says given the saw the move, so we only look at the saw the movie row

We want the people that did not read the book

There are 40 people that did not read the book out of the 60 people in the row

P ( did not read the book| saw the movie) = 40/60 = .67 or 67%