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Solution


Q.

Two dice are rolled together. The probability of getting sum of numbers on the two dice as 2, 3 or 5, is:
1 7/36  
2 11/36  
3 5/36  
4 4/9  

Ans.

(1)

When two dice are tossed together,

Total possible outcomes = 62 = 36

No. of cases getting sum two : {(1, 1)}

No. of cases getting sum three : {(1, 2)(2, 1)}

No. of cases getting sum five : {(1, 4)(4, 1), (2, 3), (3, 2)}

Thus total cases getting sum 2, 3 or 5 = 7

Therefore, required probability = 7/36