Sure! To calculate the probability that the chosen fair-haired student is a boy, we need to compare the number of fair-haired boys to the total number of fair-haired students.
We know that there are 7 fair-haired girls and 6 fair-haired boys. So the total number of fair-haired students is 7 + 6 = 13.
Out of these 13 fair-haired students, 6 are boys.
Therefore, the probability that the chosen fair-haired student is a boy is 6/13.