# Practice Questions on ProbabilityAptitude Questions and Answers

 Q1. A number X is chosen at random from the numbers -3, -2, -1, 0, 1, 2, 3. What is the probability that $|X| < 2$
 A. 5/7 B. 3/7 C. 3/5 D. 1/3
 Q2. Two brother $X$ and $Y$ appeared for an exam. Let $A$ be the event that $X$ is selected and $B$ is the event that $Y$ is selected. The probability of $A$ is $\dfrac{1}{7}$ and that of $B$ is $\dfrac{2}{9}$. Find the probability that both of them are selected.
 A. 1/63 B. 2/35 C. 2/63 D. 9/14

 Q3. An urn contains 6 red, 5 blue and 2 green marbles. If 2 marbles are picked at random, what is the probability that both are red?
 A. 6/13 B. 5/26 C. 5/13 D. 7/26
 Q4. Four dice are thrown simultaneously. Find the probability that all of them show the same face.
 A. 1/216 B. 1/36 C. 4/216 D. 3/216

 Q5. A bag contains 12 white and 18 black balls. Two balls are drawn in succession without replacement. What is the probability that first is white and second is black?
 A. 18/145 B. 18/29 C. 36/135 D. 36/145
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