Answer:
35
Step-by-step explanation:
These 3 vacancies aren’t distinct. That means if Amy, Bob, and Carla were chosen, it is the same as Bob, Carla, and Amy are chosen and so on.
Therefore, we will use “choose.”
Solving, I get 7!/((7-3)!3!) = 7!/(4!3!) = (7*6*5)/(3*2*1) = 35.
I hope this helps! :)
