7.3b Finding the Probability of Combined Events (a) A or B (b) A and B

7.3 Probability of a Combined Event   7.3b Finding the Probability of Combined Events (a) A or B(b) A and B 1. The probability of a combined event ‘A or B’ is given by the formula below.   P(A or B)=P(A∪B)                     = n(A∪B) n(S)      2. The probability of a combined event ‘A and B’ is given … Read more