At a political rally there are 20 republicians 13 democrates 6 independents. if a person is chosen at random what is the probability that the person is either a democrate or and independent?
"at random" means all choices have equal probability.
Sample space = 20+13+6=39
There are 13 democrates and 6 independents for a total of 19.
What is the probability?
19/39
Correct!
it would be 19 over 39. Good luck~!:)
To find the probability that a randomly chosen person is either a Democrat or an Independent from the given information, we need to determine the total number of people who are either Democrats or Independents, and then divide that by the total number of people at the rally.
Given:
- Republicans: 20
- Democrats: 13
- Independents: 6
The total number of Democrats or Independents is the sum of the number of Democrats and the number of Independents:
Total Democrats or Independents = 13 + 6 = 19
The total number of people at the rally is the sum of all three political groups:
Total people at the rally = Republicans + Democrats + Independents = 20 + 13 + 6 = 39
So, the probability that a person chosen at random is either a Democrat or an Independent is:
Probability = (Total Democrats or Independents) / (Total people at the rally)
Probability = 19 / 39 ≈ 0.487
Therefore, the probability that the person is either a Democrat or an Independent is approximately 0.487 or 48.7%.