thirty animals are to be used in a medical experiment on diet deficiency: 3 male and 7 female rhesus monkeys, 6 male and 8 female dogs. If one animal is selected at random, what is the probability of getting a chimpanzee or a dog?
M C. D. Total
Ma. 3. 6. 2. 11
Fe. 7. 4. 8. 19
Tot. 10. 10. 10. 30
P(Chim or Dog) = P(Chim) + P(Dog) -P(0)
10/30 + 10/30 -0 = 20/30 = 2/3
eh? No data given on chimps.
To calculate the probability of getting a chimpanzee or a dog, we need to know the total number of chimpanzees and dogs in the group. However, the number of chimpanzees in the group is not provided in the question.
If we assume there are no chimpanzees in the group of animals, then the probability of getting a dog would be:
Number of dogs / Total number of animals
Given that there are 6 male and 8 female dogs, the total number of dogs is 6 + 8 = 14.
Since we don't have information about the number of chimpanzees, we cannot calculate the exact probability. We can only provide the probability of getting a dog, which is:
14 / Total number of animals
To find the probability of selecting a chimpanzee or a dog from the group of animals, we first need to determine the total number of chimpanzees and dogs.
The given information states that there are 3 male and 7 female rhesus monkeys, which means there are a total of 3 + 7 = 10 rhesus monkeys. Since there are no specific details mentioned about chimpanzees, we can assume that there are none in the group.
Similarly, there are 6 male and 8 female dogs, which means there are a total of 6 + 8 = 14 dogs.
So, the total number of chimpanzees or dogs is 10 + 14 = 24.
Since we have a total of 30 animals, the probability of selecting a chimpanzee or a dog can be calculated as the ratio of the number of chimpanzees or dogs to the total number of animals:
Probability = (Number of chimpanzees or dogs) / (Total number of animals)
Probability = 24 / 30
Therefore, the probability of selecting a chimpanzee or a dog from the group is 24/30, which can be simplified to 4/5 or 0.8.
As a result, the probability of getting a chimpanzee or a dog when selecting one animal at random is 0.8, or 80%.