Question

Use the table on the left to help you answer a) What is the probability of selecting a pair of red shorts?b) What is the probability of selecting shirts or a white clothing item?

Answer 1

$\text{probability}=\frac{\text{ number of favorable cases}}{total\text{ number of cases}}$$\text{ P(red shorts)=}\frac{8}{4+6+2+8+3+7}=\frac{8}{30}=\frac{4}{15}$$\text{ P(shirt or white)=}\frac{4+6+2+7}{4+6+2+8+3+7}=\frac{19}{30}$

(Notice that, in the last case, there are 2 cases that satisfy both criteria at the same time, that is, there are 2 white shirts; you don't have to add it twice, that is why in the numerator there is only one 2)