If you answer this question, I will brainlist! Please help me out.

The brother has a 1/9 chance of being chosen, and the sister has 1/12. We multiply to get a 1/108 chance.
Answer:
1/108
Step-by-step explanation:
Siblings are 1 of the boys and 1 of the girls
1/9 × 1/12
1/108