Probability Questions and Answers

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Q1
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
  • A 1/2
  • B 2/5
  • C 815
  • D 920
Answer: Option D
Q2
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 10/21
  • B 11/21
  • C 2/7
  • D 5/7
Answer: Option A
Q3
 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 1/3
  • B 3/4
  • C 7/19
  • D 8/21
Answer: Option A
Q4
What is the probability of getting a sum 9 from two throws of a dice?
  • A 1/6
  • B 1/8
  • C 1/9
  • D 1/12
Answer: Option C
Q5
Three unbiased coins are tossed. What is the probability of getting at most two heads?
  • A 3/4
  • B 1/4
  • C 3/8
  • D 7/8
Answer: Option D
Q6
Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
  • A 1/2
  • B 3/4
  • C 3/8
  • D 5/16
Answer: Option B
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 21/46
  • B 25/117
  • C 1/50
  • D 3/25
Answer: Option A
Q8
In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
  • A 1/10
  • B 2/5
  • C 2/7
  • D 5/7
Answer: Option C
Q9
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 35/256
  • D 1/221
Answer: Option D
Q10
Two dice are tossed. The probability that the total score is a prime number is:
  • A 1/6
  • B 5/12
  • C 1/2
  • D 79
Answer: Option B
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