5/100=1/20
12/100=3/25
1/20+3/25=???
If a class has a population where 5% of the students have red hair and 12% have blonde hair, what's the probability that if we select one student at random that they'll have either red or blonde hair?
2 answers
or, more easily,
5/100 + 12/100 = ?
5/100 + 12/100 = ?