secondary 4 chevron_right E Maths chevron_right Singapore

a)(i) use the graph to find the median duration of movies for airline B
a)(ii) use the graph to find the interquartile range of duration of movies for airline A
b) Ali flies with airline A and he watched 2 different movies with no break between them. What is the maximum possible duration of the 2 movies?
c) Ali prefers to watch movies with a duration between 140 min and 160 min. which airlines would be a better choice for Ali? Justify your answer using appropriate figures.
d) meals on airline A are served 2hrs into the flight. Ali starts to watch a movie as the plane takes off. What is the probability that the movie is still playing when his meal is served? leave ur answer as a fraction in its simplest form.
e) there are 50 action movies, 10 romance movies and 60 comedy movies. Ali chose 3 different movies at random to watch on the plane. Find, as a fraction in its simplest form, the probability that he chose at least 2 comedy movies.