Of the 60 students in orchestra,
24 are in chorus and 15 are in
photography. Four of the students
are in chorus and photography.
If one student is chosen at random,
What is the probability that this
student is in chorus, given that
they are not in photography?
A) 9/20
playing volleyball
B) 2/5
running a marathon
C) 4/9
eating cupcakes
D) 5/12 wake surfing
E) 1/3 driving bumper cars
o Cha Wason (AI Things Algebra UCL 2018