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Probability Questions and Answers
Q1. A box contains 5 green, 4 yellow and 3 white marbles. Three marbles are drawn at random. What is the probability that they are not of the same colour ?
A. 3/44
B. 52/55
C. 41/44
D. 3/55
Q2. What is the probability of getting a sum 9 from two throws of a dice ?
A. 1/6
B. 1/9
C. 1/8
D. 1/12
Q3. Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even ?
A. 1/2
B. 3/8
C. 5/16
D. 3/4
Q4. A speaks truth in 75% cases and B in 80% of the cases. In what percentage of cases are they likely to contradict each other, narrating the same incident ?
A. 35%
B. 15%
C. 5%
D. 45%
Q5. From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings ?
A. 1/15
B. 25/57
C. 1/221
D. 35/256
Q6. Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is :
A. 13/102
B. 3/20
C. 29/34
D. 47/100
Q7. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is :
A. 3/25
B. 1/50
C. 21/46
D. 25/117
Q8. A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is :
A. 3/22
B. 2/91
C. 2/77
D. 1/22
Q9. A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue ?
A. 2/7
B. 5/7
C. 10/21
D. 10/21
Q10. In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green ?
A. 2/3
B. 3/4
C. 8/21
D. 7/19