Write the total number of possible outcomes in a throw of 3 dice in which at least one of the dice shows an even number.
Total possible outcomes in a throw of 3 dice = 63 = 216.
When, no die shows an even number i.e. all the die shows odd number (1, 3 or 5), then, the number of possible outcomes = 33 = 27.
Hence, the total number of possible outcomes in a throw of 3 dice in which at least one of the dice shows an even number = 216 - 27
= 189.