Probability Archives - SPM Additional Mathematics

7.6.2 Probability, Long Questions (Question 2 & 3)

October 21, 2019January 20, 2015 by

Question 2: A bag contains 4 red cards, 6 blue cards and 5 green cards. A card is drawn at random and its colour is recorded and then it is returned to the bag before the second card is drawn at random. Find the probability that (a) all the three cards are blue, (b) there … Read more

7.6.1 Probability, Long Questions (Question 1)

May 17, 2020January 14, 2015 by

Question 1: Peter, William and Roger compete with each other in shooting a target. The probabilities that they strike the target are 2 5 , 3 4 and 2 3 respectively. Calculate the probability that (a) all the three of them strike the target, (b) only one of them strikes the target, (c) at least … Read more

7.5.1 Probability, Paper 1 (Short Questions)

September 19, 2019January 10, 2015 by

Question 1: The probability of student P being chosen as a school prefect is 3 4 while the probability of student Q being chosen is 5 6 . Find the probability that (a) both of the students are chosen as the school prefect, (b) only one student is chosen as a school prefect. Solution: (a) … Read more

7.4 Probability of Independent Events

May 21, 2020January 8, 2015 by

7.4 Probability of Independent Events 1. In an experiment, if the outcomes of event A do not influence the outcomes of event B, then the two events are independent. 2. If A and B are two independent events, the probability for the occurrence of events A and B is P (A ∩ B) = P (A) … Read more

7.3 Probability of Mutually Exclusive Events

May 21, 2020January 6, 2015 by

7.3 Probability of Mutually Exclusive Events 1. Two events are mutually exclusive if they cannot occur at the same time. 2. If A and B are mutually exclusive events, then P (A υ B) = P (A) + P (B) Example: A bag contains 3 blue cards, 4 green cards and 5 yellow cards. A card is chosen at random … Read more

7.2 Probability of the Combination of Two Events

May 21, 2020January 4, 2015 by

7.2 Probability of the Combination of Two Events 1. For two events, A and B, in a sample space S, the events A ∩ B (A and B) and A υ B (A or B) are known as combined events. 2. The probability of the union of sets A and B is given by: P ( A ∪ … Read more

7.1 Probability of an Event

September 19, 2019January 2, 2015 by

7.1 Probability of an Event 1. An experiment is a process or an action in making an observation to obtain the require results. 2. An outcome of an experiment is a possible result that can be obtained from the experiment. 3. A sample space of an experiment is the set of all the possible outcomes of an … Read more