Final answer:
The probability of wearing 2 blue shirts out of 13 shirts is 2/13.
Step-by-step explanation:
To calculate the probability of wearing 2 blue shirts out of 13 shirts, we need to divide the number of favorable outcomes (2 blue shirts) by the total number of possible outcomes (13 shirts).
Probability = Number of favorable outcomes / Total number of possible outcomes.
In this case, the number of favorable outcomes is 2 (wearing 2 blue shirts) and the total number of possible outcomes is 13 (total number of shirts).
So, the probability of wearing 2 blue shirts out of 13 shirts is 2/13.