What is the probability that a chosen student will be a freshman if there are 350 freshman 320 sophomores 310 juniors and 400 seniors?
The answer, rounded to one decimal place, is 25.4%. This means
you have just over a one-in-four chance of choosing the freshman
from the entire student population.
You can figure it out for yourself by solving this division
formula:
(size of group you want to pick one from)
--------------------------------------------------------- =
Probability of choosing from the group
(Total size of population you'll choose from)
For this problem, the answer is:
350 / (350+320+310+400) = 350 / 1380 = 0.253623188.... ~=
25.36%