# Practice Questions on ProbabilityAptitude Questions and Answers

## Moderate Probability Question - 26

 Q26. A box contains 9 red toys, 7 green toys and 9 blue toys. Each ball is of a different size. The probability that the red ball being selected is the smallest red toy, is:
 A. 1/9 B. 2/21 C. 1/25 D. 6/25

## Moderate Probability Question - 27

 Q27. If five dice are thrown simultaneously, what is the probability of getting the sum as seven?
 A. $\dfrac{15}{6^5}$ B. $\dfrac{11}{6^5}$ C. $\dfrac{10}{6^5}$ D. $\dfrac{5}{6^5}$

## Moderate Probability Question - 28

 Q28. There are three events $A, B$ and $C$, one of which must and only can happen. If the odds are $8:3$ against $A, 5:2$ against $B$, the odds against $C$ must be:
 A. $13:7$ B. $3:2$ C. $43:34$ D. $43:77$

## Moderate Probability Question - 29

 Q29. If the probability that $X$ will live 15 year is 7/8 and that $Y$ will live 15 years is 9/10, then what is the probability that both will live after 15 years?
 A. 1/20 B. 63/80 C. 1/5 D. None of these

## Moderate Probability Question - 30

 Q30. Four boys and three girls stand in queue for an interview. The probability that they stand in alternate positions is:
 A. 1/35 B. 1/34 C. 1/17 D. 1/68
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