## Elementary Statistics (12th Edition)

a) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{3}{11+3}=0.214=21.4$%. b) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{12}{12+2}=0.857=85.7$%. c) By seeing the earlier results, the labels described as ratio are much better.