Question

250 students were asked to name their favorite type ofmovie. The circle graph below represents the resultsof the survey. How many more students chose actionmovies than drama movies?

Answer 1

250 students represents the total amount of students.

We need to compute the following:

x = # action movies - # drama movies

But first, we need to calculate each number of movies, i.e, the number of action movies and the number of drama movies. Let's do that:

# action movies = ratio action movies * total number of students = 0.20 * 250 = 50

# drama movies = ratio drama movies * total number of students = 0.10 * 250 = 25

So:

x = # action movies - # drama movies = 50 - 25 = 25 (answer)

Let me clarify something:

ratio of a movie = (porcentaje of the movie) / 100%

For example:

ratio of action movies = (20%) / (100%) = 0.20