Bece Model Questions Vol1 2017 Cultural And Creative Arts Question 5

A student is preparing a paint mixture to obtain a specific shade of green for a school mural. The only primary paints available are red, blue and yellow. The student knows that mixing yellow and blue yields green, but the exact hue depends on the mixing ratio. The target colour, measured with a colour meter, has the following RGB values (on a scale of 0–255): R = 30, G = 180, B = 20. From trial mixes the following data were recorded: - Mix 1: 10 mL yellow + 5 mL blue → colour reading R = 40, G = 150, B = 30. - Mix 2: 8 mL yellow + 8 mL blue → colour reading R = 35, G = 170, B = 25. Assume that the colour reading varies linearly with the volumes of yellow (Y) and blue (B) used and that no paint gives a colour reading of (0,0,0). The student has 200 mL of yellow paint and 150 mL of blue paint available. Answer the following: