When does the union of two events occur?

What do you call the collection of all outcomes that is an element of one or the other of the sets A and B, or both of them?

In the formula for finding the probability of a union of two events: P(A U B) = P(A) + P(B) – P(A ∩ B), why is P(A ∩ B) subtracted from P(A) + P(B)?

From a deck of 52 cards, what is the probability of drawing a number card or a spade?

Two dice are tossed at the same time, what is the probability of getting a sum greater than 10?

Fifteen balls in a jar are numbered from 1 to 15. A ball is drawn at random. What is the probability that the number on the ball is less than 6 or even?

What is P(A∩B) if P(A) = 0.65, P(B) = 0.30 and P(A∪B) = 0.75?

Mang Pepito has a farm with chickens and pigs. 27% are chickens and 39% are pigs. What is the probability that an animal chosen in random is either a chicken or a pig?

In a class of 29 students, 15 like Science and 21 like Math. They all like at least 1 of the two subjects. What is the probability that a student chosen in random likes Math or Science?