Table of Contents

## Does either mean both probability?

“Either A or B” most precisely means, in symbolic logic terms, “A XOR B”, where XOR is the “exclusive or”. So yes, it means “A or B but not both”.

**How do you find the probability of either A or B?**

Inclusion-Exclusion Rule: The probability of either A or B (or both) occurring is P(A U B) = P(A) + P(B) – P(AB). Conditional Probability: The probability that A occurs given that B has occurred = P(A|B). In other words, among those cases where B has occurred, P(A|B) is the proportion of cases in which event A occurs.

**What is the probability of A or B but not both?**

So the probability of being in A or B but not both is 0.5−0.2.

### How do you calculate PA and B?

Formula for the probability of A and B (independent events): p(A and B) = p(A) * p(B). If the probability of one event doesn’t affect the other, you have an independent event. All you do is multiply the probability of one by the probability of another.

**What does either A or B mean?**

In this phrase, ‘either’ means one OR the other; A OR B. You MUST make a choice. Both of them could POSSIBLY be your friend, but according to this phrase you must choose only ONE of them.

**What does either mean in a math problem?**

For example, in mathematics, the statement “If is a real number, then either or ” allows the possibility that satisfies both , as well as (which is true of the real number ).

## How do you find PA and B independent?

**How to calculate the probability of only a occurring?**

Then, the probability of only A occurring is the probability of A occurring given that only one of the events will occur, or P (A ∣ S), where S is the event that only one of A and B occurs. Then the answer is P (A ∩ S) P (S) = P (A) P (A ∪ B) − P (A ∩ B) =.75.8 =.9375. This doesn’t seem correct or simple enough.

**Which is the probability of rolling a 3 or a 5?**

Therefore, the probability of rolling either a 3 or a 5 is P ( A or B) is equal to 1/6 + 1/6, which is 2/6, or 1/3. These events are called non-overlapping events, or events that are independent of each other.

### How do you determine the probability of an event?

Probability is the chance that something is or is not going to happen. To determine the probability of an event, you need to determine the number of favorable events and divide that by the number of total events that could happen.

**How is the probability of two events independent?**

If events are independent, then the probability of them both occurring is the product of the probabilities of each occurring. P (A) = 0.20, P (B) = 0.70, A and B are independent. The 0.14 is because the probability of A and B is the probability of A times the probability of B or 0.20 * 0.70 = 0.14.