At a political rally there are 20 republicians, 13 democrates, 6 independents. If a person is chosen at random what is the probability that
a) the person is either a democrate or and independent?
So of the 39 people, how many are either democrats or independents?
20 + 13 + 6 = 39, which is the total number of people.
13 + 6 = 19, this tells us how many democrats and independents there are.
So of the 39 people, 19/39 people are either democrats or independents
To find the probability that a randomly chosen person is either a Democrat or an Independent, you need to calculate the total number of Democrats and Independents and divide it by the total number of people at the rally.
In this case, there are 13 Democrats and 6 Independents, so the total number of Democrats or Independents is 13 + 6 = 19.
The total number of people at the rally is the sum of Republicans, Democrats, and Independents, which is 20 + 13 + 6 = 39.
Therefore, the probability that a randomly chosen person is either a Democrat or an Independent is 19/39.
So, the probability is 19/39, which is approximately 0.487 or 48.7%.