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Arithmetic Aptitude :: Probability

  1. 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?
  2. A.
    24/455
    B.
    3/91
    C.
    12/455
    D.
    15/91
    E.
    None of these

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  3. 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?
  4. A.
    4/9
    B.
    5/9
    C.
    7/9
    D.
    8/9
    E.
    1/3

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  5. Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is -.
  6. A.
    10/17
    B.
    10/19
    C.
    46/105
    D.
    11/15
    E.
    Cannot be determined

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  7. 10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
  8. A.
    1/10
    B.
    9/10
    C.
    1/5
    D.
    3/10
    E.
    1/2

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  9. 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 -.
  10. A.
    0.4869
    B.
    0.5904
    C.
    0.6234
    D.
    0.5834
    E.
    0.2952

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  11. 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?
  12. A.
    5/21
    B.
    5/14
    C.
    9/14
    D.
    16/21
    E.
    1/3

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  13. 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?
  14. A.
    18/35
    B.
    12/35
    C.
    17/35
    D.
    19/35
    E.
    None of these

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  15. 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?
  16. A.
    1/6
    B.
    5/8
    C.
    3/8
    D.
    5/6
    E.
    7/8

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  17. 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 -.
  18. A.
    1/26
    B.
    3/52
    C.
    15/26
    D.
    11/26
    E.
    1/13

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  19. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:
  20. A.
    1/13
    B.
    2/13
    C.
    1/26
    D.
    1/52

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