Since the blue team already poured ten 5 liters bottles so 10 x 5 = 50
And three 10 liters bottles so 3 x 10 = 30
Now you would add that up , 30 + 50 = 80
Then you subtract it from 200
200 - 80 =120
The last step is to divide by ten since it’s asking how many 10 liters bottles is need to fill the rest
120 divided by 10 =12
The blue team will need twelve 10 liters bottles to fill the container