We know that,

Probability of occurrence of an event

Total outcomes are 1, 2, 3, 4, 5, 6, and the desired outcomes are 2, 3

Therefore, total no.of outcomes are 6, and total no.of desired outcomes are 2

Probability of getting a 2 or 3

Conclusion: Probability of getting 2 or 3 when a die is thrown is