To find how many many different shades of paint did the students make
We will find the ratio between the yellow paint and the blue paint
So,
Row number 1 , yellow : blue = 1 : 2
Row number 2 , yellow : blue = 2 : 3
Row number 3 , yellow : blue = 2 : 4 = 1 : 2
Row number 4 , yellow : blue = 4 : 8 = 1 : 2
Row number 5 , yellow : blue = 6 : 9 = 2 : 3
Row number 6 , yellow : blue = 8 : 12 = 2 : 3
So, the number of different ratios are 2 ratios, which are [ 1 : 2 ] and [ 2 : 3 ]
so, There are 2 different shades of paint the students made
We know using the ratio between yellow and blue