Discussion
A single die is rolled. The probability of getting 1 or an even number is
Answer: B
The favourable outcomes are 1 together with the even numbers 2, 4 and 6.
\[ \{1, 2, 4, 6\} \rightarrow 4 \text{ outcomes} \]
\[ P = \frac{4}{6} = \frac{2}{3} \]
1 is odd, so it does not overlap with the even numbers and nothing has to be subtracted - counting only three outcomes would leave 1 out.
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