Answer
a) $0.282$
b) $0.303$
c) $0.242$
d) $0.297$
e) $0.0792$
f) $0.738$
g) $0.703$
Work Step by Step
We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$. Hence:
a) $ P=\frac{121+51}{611}=0.282$
b) $P=\frac{121}{121+279}=0.303$
c) $P=\frac{51}{160+51}=0.242$
d) $P=\frac{51}{121+51}=0.297$
e) We use the result from part a) to find: $P=0.282^2=0.0792$
f) We use the results above to find: $\frac{400}{611}+\frac{51}{611}=0.738$
g) $P=\frac{121}{121+51}=0.703$
