# 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

Q41. **The probability of a lottery ticket being a prized ticket is 0.2. When 4 tickets are purchased, the probability of winning a prize on atleast one ticket is -.**

1.  0.4869
2.  0.5904
3.  0.6234
4.  0.5834
5.  0.2952

Solution : 0.5904
Q42. **In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples?**

1.  5/21
2.  5/14
3.  9/14
4.  16/21
5.  1/3

Solution : 5/21

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Q43. **The probability that A speaks truth is 3/5 and that of B speaking truth is 4/7. What is the probability that they agree in stating the same fact?**

1.  18/35
2.  12/35
3.  17/35
4.  19/35
5.  None of these

Solution : 18/35
Q44. **Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?**

1.  1/6
2.  5/8
3.  3/8
4.  5/6
5.  7/6

Solution : 5/6

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Q45. **From a pack of cards two cards are drawn one after the other, with replacement. The probability that the first is a red card and the second is a king is -.**

1.  1/26
2.  3/52
3.  15/26
4.  11/26
5.  1/13

Solution : 1/26
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