Answer
a. $0.058$
b. $0.942$
c. $0.335$
Work Step by Step
The total number is 17230
a. A female student aged 25–34 years
P(female student aged 25–34)=$995/17230=0.058$
b. Male or aged 18–24 years
P(male)=$10456/17230=0.607$, P(aged 18–24)=$13701/17230=0.795$,
P(Male and aged 18–24)=$7922/17230=0.460$
P(Male or aged 18–24)=$0.607+0.795-0.460=0.942$
c. Under 25 years of age and not male
P(Under 25 years of age and not male)=P(female under 25 years)=$5779/17230=0.335$