Question

Find p (freshman boy)

Answer 1

The answer is 1/3

Explanation:

Trust me

Answer 2

Answer:
`(1)/(3)`

Explanation:

Given

total no of boys =12

total no of girls=18

Probability that of getting a freshman provided it is a boy

`\Rightarrow P(\text{freshman}|\text{boy})=\frac{\text{P(Freshman and boy)}}{\text{boy}}\\\\\Rightarrow P(F|B)=(P(F\cap B))/(P(B))=(4)/(12)\\\\\\Rightarrow P(F|B)=(1)/(3)`