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Question 1 of 51. Question
A box contains 2 green and 3 red balls of identical size. If two balls are picked randomly, one after the other, without replacement, what is the probability of picking two balls of different colours?

Question 2 of 52. Question
A bag contains 5 red balls and 3 green balls. Two balls are picked, one after the other with replacement. The probability the both are the same colour is

Question 3 of 53. Question
The chances of occurrence of three independent events X,Y and Z are 1/3, ¼ and 2/5. What are the chances of occurrence of only Y and Z?

Question 4 of 54. Question
Two dice are thrown at the same time. What is the probability that the sum will be 7 or 11?

Question 5 of 55. Question
The table below gives the marks scored by a group of students in a test.
Mark 0 1 2 3 4 5
Frequency 1 2 7 5 4 3What is the probability of selecting a student from the group that scored 2 or 3?