Probability - Quantitative Aptitude (MCQ) questions for Q. 132

Q.  Two dice are tossed simultaneously. Find the probability that the total is a prime number.
- Published on 15 Jun 15

a. 7/9
b. 5/12
c. 1/6
d. 5/9

ANSWER: 5/9

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    Discussion

  • priyanshi   -Posted on 25 Apr 23
    total probability=36
    probability of sum as prime number=15
    ANS=5/12
  • Sirisha   -Posted on 31 Dec 20
    Answer is 5/12
  • Akshay   -Posted on 01 Sep 20
    p= required events / total number of events
    total events = 6 * 6 = 36
    Events that produces sum as prime numbers are 15
    as per the formula = 15/36= 5/12=>answer
  • Ravi pratap singh   -Posted on 09 Oct 19
    answer is 5/12
  • Prasun Jaiswal   -Posted on 12 Aug 17
    The answer given is wrong as the right answer is 5/12
    We get this by finding the total probability as 6x6 = 36
    than finding the numbers whose sum is either 2 , 3 , 5 , 7 , 11
    {1,1 ; 2,1 ; 1,2 ; 3,2 ; 2,3 ; 4,3 ; 3,4 ; 5,2 ; 2,5 ; 6,1 ; 1,6 ; 5,6 ; 6,5 ; 4,1 ; 1,4 }
    Total = 15;
    i.e. = 15/36;
    = 5/12; Answer

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