7.5 Probability (II), SPM Practice (Long Questions)

Question 7:Diagram below shows 4 cards labelled with letters.Two cards are chosen at random from the box, one by one, without replacement.(a) List the sample space.(b) Find the probability that(i) at least one card chosen is labelled C,(ii) both cards chosen are labelled with same letter.Solution:(a)Sample space, S= {(C, O1), (C, O2), (C, L), (O1, … Read more7.5 Probability (II), SPM Practice (Long Questions)

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 more7.3b Finding the Probability of Combined Events (a) A or B (b) A and B

7.3a Finding the Probability of a Combined Event by Listing the Outcomes

7.3 Probability of a Combined Event   7.3a Finding the Probability of a Combined Event by Listing the Outcomes 1. A combined event is an event resulting from the union or intersection of two or more events. 2.The union of combined event ‘A or B’ = A υ B 3.The intersection of combined event ‘A and B’ = A ∩ … Read more7.3a Finding the Probability of a Combined Event by Listing the Outcomes