Answer:
Step-by-step explanation:
starting with 9 assistants it will take 3 months to have 12(one each month)
9 +1+1+1 =12
starting with 6 seniors it will take 3 months to get 12(2 each month)
6+ (2 +2+2) =12
after3 months there will be 12 of each type of caregiver