P(A and B) Hint:
Find P (Senior Boy)
P(B)
Classroom of Students
Boys Girls
Freshman 4
4 8
Sophomore 5 7 12
[?]
Junior 2 3 5
Senior 1
4 5
12 18
Please help :(

Step-by-step explanation:

Number of boys = 12

Number of girls = 18

Total number of students = 12 + 18 = 30

Probability refers to chances of occurrence of any event.

Probability = Number of favorable outcomes ÷ Total number of possible outcomes

To find P(Senior | Boy), use

P(Senior and Boy) =

P(Boy) =

So,

P(Senior | Boy) = P(Senior and Boy) ÷ P(Boy) =

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100