Question

# Let the sample space be S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. Suppose the outcomes are equally likely. Compute the probability of the event E="an even number less than 9."

Probability and combinatorics
Let the sample space be
$$S={1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.$$
Suppose the outcomes are equally likely. Compute the probability of the event E="an even number less than 9."

$$P(E) = \frac{N(E)}{N(\Omega)} = \frac{4}{10} = 0.4$$