Question

For a certain class, the following data table compares how many students play an instrument or a sport. What is the probability that a student chosen randomly from the class plays neither a sport nor an instrument?
Plays an instrument Does not play an instrument
Plays a sport 4 3
Does not play a sport 5 12

Answer 1

There are 4+3+5+12 = 24 students total. The number who play neither is 12, so the probability is 12/24 = 1/2.