In a certain town, 40% of residents own a dog, 30% own a cat, and 20% own both. What is the probability that a randomly selected resident owns a cat, given that they own a dog?
b) If a sample of 25 bulbs is selected, what is the probability that the sample mean lifespan is greater than 1010 hours? Ap Statistics Test B Probability Part Iv Answer Key
P(Cat | Dog) = P(Cat ∩ Dog) / P(Dog) = 0.20 / 0.40 = 0.50 In a certain town, 40% of residents own