Two fair and ordinary dice are rolled simultaneously. The probability of getting the sum of outcomes of the dice as a multiple of 4, is equal to |
$\frac{5}{9}$ $\frac{1}{4}$ $\frac{1}{9}$ $\frac{1}{3}$ |
$\frac{1}{4}$ |
In the case sum can be 4 or 8 or 12. Total ways of getting the sum as 4 = 3 (namely (2, 2), (1, 3), (3, 1)). Total ways of getting the sum as 8 = 5 (namely (2, 6), (6, 2), (3, 5), (5, 3), (4, 4)) Total ways of getting the sum as 12 = 1 (namely (6, 6)) Thus total ways of getting the sum as multiple of four = 3 + 5 + 1 = 9 Thus, required probability = $\frac{9}{36}=\frac{1}{4}$ |