Question

A dice is thrown. Find the probability of getting:

 2 or 4

Answer 1

The sample space of the given experiment is given by
S = {1, 2, 3, 4, 5, 6}
∴ n (S) = 6

Let B be the event of occurrence of the number 2 or 4.
     Then B = {2,4}
     i.e. n (B) = 2

\[\therefore P\left( B \right) = \frac{\text{ Number of outcomes favourable to B} }{\text{ Total number of possible outcomes }} = \frac{n\left( B \right)}{n\left( S \right)} = \frac{2}{6} = \frac{1}{3}\]