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Two dice are rolled. Find the probability that the sum of their upper faces is (i) an Even number (ii) Divisible by 4 (iii) Divisible by 3 and 4 Select the correct answer from above options

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Here, total number of outcomes ` = 6^2 = 36` (i) When sum is an even number, then possible outcomes `=` `{(1,1),(1,3),(1,5),(2,2),(2,4),(2,6),(3,1),(3,3),(3,5),(4,2),(4,4),(4,6)` `,(5,1),(5,3),(5,5),(6,2),(6,4),(6,6)}` So, total number of possible outcomes ` = 18` `:.` Probability in this case ` = 18/36 = 1/2` (ii)When sum is divisible by `4`, then possible outcomes `=` `{(1,3),(2,2),(2,6),(3,1),(3,5),(4,4),(5,3),(6,2),(6,6)}` So, total number of possible outcomes ` = 9` `:.` Probability in this case ` = 9/36 = 1/4` (iii)When sum is divisible by `3` and `4`, then possible outcomes `=` `{(6,6)}` So, total number of possible outcomes ` = 1` `:.` Probability in this case ` = 1/36`

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