Answer
a. P(male and works for more than 10 hours per week)= $0.45*0.62$=0.279
b. P(female or works for more than 10 hours per week) =(0.55+0.62)-0.341=0.829
Work Step by Step
P(female)=0.55, P(male)=1-0.55=0.45
P(students work for more than 10 hours)=0.62
P(male and works for more than 10 hours per week)= $0.45*0.62$=0.279
P(female and works for more than 10 hours per week) = $0.55*0.62$ = 0.341
P(female or works for more than 10 hours per week) =(0.55+0.62)-0.341=0.829
