Probability - Quantitative Aptitude (MCQ) questions for Q. 72

Q.  A dice is rolled twice. What is the probability of getting sum 9?
- Published on 12 Jun 15

a. 2/3
b. 1/3
c. 1/9
d. 3/9

ANSWER: 1/9
 
Possible event = 6*6 = 36

Favourable outcomes= {(3, 6), {4, 5}, {5, 4}, (6, 3)}

Thus probability; favourable/total
= 4/36

=> 1/9

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