Problema Solution
Consider a discussion group of 7 democrates, 8 republicians, and 2 indenpendents. Suppose that two group members ramdomly selected, in succession, to attend a poltical convention. Find the probabilty of selecting no democrates
Answer provided by our tutors
You have 10 members who are not democrats, out of 17 in total. So the probability of selecting a non-democrat for the first person is 10/17.
Now you have 9 non-democrats out of 16. So the probability of the second one not being a democrat is 9/16.
To get the probability that both are non-democrats, just multiply them together:
10/17x9/16= 90/272 = 45/136 = 0.331 or 33.1%