Question

In a single throw of a die, the probability of getting a composite number is :

(a) 1/3

(b) 1/2

(c) 2/3

(d) 5/6

Answer 1

Correct answer is (a) 1/3

On a through of a dice 6 possible outcomes are possible.

There are {1, 2, 3, 4, 5, 6}. Among which only 4 and 6 are composite numbers i.e. two  numbers are composite.

Now from the definition of probability, the probability of getting a composite number on the throw of dice is 2/6 = 1/3.