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Arithmetic Aptitude :: Probability

  1.  The first 7 alphabets are written down at random. what is the probability that the letters a,b,c always come together?

  2. A.

    1/7

    B.

    2/7

    C.

    3/7

    D.

    4/7


  3.  The last 5 alphabets are written at random then the probability that the letters y and z are written down side by side is : -

  4. A.

    1/5

    B.

    2/5

    C.

    3/5

    D.

    4/5


  5.  Find the probability that getting 4 digit number with 1 in the unit place and 2 in the tens place when the numbers 1,2,3,4 and 5 are arranged at random without repeating.

  6. A.

    1/5

    B.

    1/10

    C.

    1/15

    D.

    1/20


  7.  Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is odd?

  8. A.

    1/2

    B.

    2/3

    C.

    3/4

    D.

    1/3


  9.  Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at least 10?

  10. A.

    1/3

    B.

    1/6

    C.

    2/3

    D.

    5/6


  11.  Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at most 5?

  12. A.

    2/9

    B.

    2/18

    C.

    4/9

    D.

    5/18


  13.  Two dice are thrown simultaneously. What is the probability of getting the face numbers are same?

  14. A.

    1/6

    B.

    2/3

    C.

    4/9

    D.

    5/6


  15.  In a class, there are 12 boys and 16 girls. One of them is called out by an enroll number, what is the probability that the one called is a girl?

  16. A.

    1/4

    B.

    2/5

    C.

    4/7

    D.

    5/12


  17.  A box contains 3 white, 4 red and 7 blue erasers. If five erasers are taken at random then the probability that all the five are blue color is: -

  18. A.

    2/126

    B.

    3/286

    C.

    12/121

    D.

    13/211


  19.  A box contains 6 bottles of variety 1 drink, 3 bottles of variety 2 drink and 4 bottles of variety 3 drink. Three bottles of them are drawn at random, what is the probability that the three are not of

  20. A.

    632/713

    B.

    752/833

    C.

    833/858

    D.

    none of these