There are four men and six women on the city councils. If one council member is selected for a committee at random, how likely is that it is a women?
given: four men and six women
formula: 
from the city council one person is selected as a council member so, we have to find the probability that it is a woman
total possible outcomes of selecting a person is 10C1
therefore n(S)= 10C1
let E be the event that it is a woman
n(E)= 6C1=6
20