Answer
a)78.6%
b)14.3%
c)The labels described as concentration are much better.
Work Step by Step
a) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{11}{11+3}=0.786=78.6$%.
b) We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence probability=$\frac{2}{12+2}=0.143=14.3$%.
c) By seeing the earlier results, the labels described as concentration are much better.
