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1. The animal colony in the psychology department contains 30 female rats and 10 male rats. What is the probability of obtaining a female rat?

1. The animal colony in the psychology department contains 30 female rats and 10 male rats. What is the probability of obtaining a female rat?

2. Six people are running for public office. Five candidates have the same chance of winning while the 6th candidate has twice the chance as compared to each of the other candidate. What is the probability that the 6th candidate wins (in fraction)?

3. The sum of the probabilities of all outcomes in the sample space.

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