8freshmen, 9 sophomores, 9 juniors, and 7 seniors are eligible to be on a committee.
in how many ways can a dance committee be chosen if it is to consist of 4 freshmen, 5 sophomores, 2 juniors, and 3 seniors.

answer: 17,082

step-by-step explanation:

you need to multiply the amount of possibilities and then subtract one each time (because one person has been chosen).

the equation is (8*7*6*5)+(9*8*7*6*5)+(9*8)+(7*6*5)

each parenthesis' units correspond to the number of people that can be elected. message me if that doesn't make sense and i can explain it better.

ratio is 2 : 9

the answer is three

13.5 : 3