Probability
Probability: Probability Formulas, Probability Meaning, Conditional Probability Definition, Probability Problems, Probability Questions with Solved Exercises
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Online Aptitude Questions with Answers on Probability
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?**
- 1/2
- 2/5
- 8/15
- 9/20
Solution : 9/20
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?**
- 10/21
- 11/21
- 2/7
- 5/7
Solution : 10/21
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?**
- 1/3
- 3/4
- 7/19
- 8/21
- 9/21
Solution : 1/3
Q4. **What is the probability of getting a sum 9 from two throws of a dice?**
- 1/6
- 1/8
- 1/9
- 1/12
Solution : 1/9
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Q5. **Three unbiased coins are tossed. What is the probability of getting at most two heads?**
- 3/4
- 1/4
- 3/8
- 7/8
Solution : 7/8
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