He puts 6 tins into each small box.
He puts 20 tins in each large box.
Carlo puts a total of 3000 tins into the boxes so that
number of tins in small boxes : number of tins in large boxes = 2 : 3
Carlo says that less than 30% of the boxes filled with tins are large boxes.
Is Carlo correct?
I divided 3000 by 5 because 2+3=5
then I times that by the small boxes and large boxes - 2 : 3
I ended up getting the ratio 1200 : 1800
And now I'm not sure how to prove whether he's right or wrong