Answer:
47%
Step-by-step explanation:
Chance of liberal in first district = 21%
Chance of liberal in second district = 45%
Chance of liberal in third district = 75%
Assuming that all districts are equally likely to be selected, the probability that a randomly selected voter is a liberal is given by the average of the probability of a voter being a liberal in each district:
The probability that she will be a Liberal is 47%.