geometry
posted by tamara .
Lenny’s favorite radio station has this schedule:
news: 15 min.
commercials: 3 min.
music: 42 min.
If Lenny chooses a time of day at random to turn on the radio to his favorite station, what is the probability that the news will be on?

total time = 60
prob (news) = 15/60 = 1/4