# 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

Q36. **A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are drawn what is the probability that one is yellow and two are red?**

1.  24/455
2.  3/91
3.  12/455
4.  15/91
5.  None of these

Solution : 12/455
Q37. **A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?**

1.  4/9
2.  5/9
3.  7/9
4.  8/9
5.  1/3

Solution : 5/9
Q38. **Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is -.**

1.  10/17
2.  10/19
3.  46/105
4.  11/15
5.  cannot be determined

Solution : cannot be determined
Q39. **What is the probability that a leap year has 53 Sundays and 52 Mondays?**

1.  0
2.  1/7
3.  2/7
4.  5/7
5.  6/7

Solution : 1/7

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Q40. **10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.**

1.  1/10
2.  9/10
3.  1/5
4.  3/10
5.  1/2

Solution : 1/5
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