# Question

Consider the following addition rule to find the probability of the union of two events A and B:

P(A or B) = P(A) + P(B) – P(A and B)

When and why is the term P(A and B) subtracted from the sum of P(A) and P(B)? Give one example where you might use this formula.

P(A or B) = P(A) + P(B) – P(A and B)

When and why is the term P(A and B) subtracted from the sum of P(A) and P(B)? Give one example where you might use this formula.

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