Question

Multiple choice section (3 marks each) 5. Two dice are rolled and the numbers are added togen 1 is s are added together. The probability of the total being B) 1 C) O D) none of the above 6. Supposed Suppose A and B are independent events where P(A) -0.4, P(B) -0.5. Then PAB) A) O B) 0.40 C) 0.20 D) none of these 7. What is the probability of scoring 11 when you roll two dice? A) 2/36 B) 1/36 C) 5/36 D) none of these 8. If the probability of an event happening is 1/4 then the probability of it not happening is A) 1/4 B) 2/4 C) 3/4 D) none of these

Answer 1

ond Two dice are rolled total outcomes a 36 3 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (2, 1) (2,2 (2, 3) (2,4) (2,5) (2,6) (31) (3, 2) (3, 3) (3,4) (3,5) (3,6). (4,1) (4, 2) (4,3) (4,4) (4,5) (4,6) (5, 1) (5,2) (5,3) (5,4) (5,5) (5,6). (6, 1) (6, 2) (6,3 (6,4) (6,5) (6,6). 4 the numbers are added together, probability of total being I is o I and B are independent events. PLA) = 0.4 , P (B) = 0.5. P(A/B) = P(ANB) - PLANB) =P(A) *P(B). = 0.4 * 0.5 PLANB) = 0.20. P(A/B) = 0.5 P(A/B) = 0.4

probability of scoring 11 when you rolu two dice. y. (5,6) (6,5) = 2/6 ottie probability of an event happening is 1/4 probability of not happening = 1- probability of event! happen = 1-1/4 2 3/4