During a telematch, each group of pupils was supposed to collect as many coloured balls as possible. Each colour represented a certain point as tabulated:

Colours	Points
Red	3
Yellow	5
Green	8

In each container, the number of red balls was 80% more than the number of green balls and 90% less than the number of yellow balls. Given that the total possible points if the group managed to collect all the balls were 1551 points, how many balls were not red in colour?

Red	Yellow	Green
9x1		5x1
1x9	10x9
9 u	90 u	5 u

	Red	Yellow	Green	Total
Number	9 u	90 u	5u
Value	3	5	8
Total value	27 u	450 u	40 u	517 u

100% + 80% = 180%
180% = ¹⁸⁰₁₀₀ =⁹₅

100% - 90% = 10%
10% = ¹⁰₁₀₀ = ¹₁₀

Total number of points collected
= 27 u + 450 u + 40 u
= 517 u

517 u = 1551

1 u = 1551 ÷ 517 = 3

Number of balls not red in colour
= 90 u + 5 u
= 95 u
= 95 x 3
= 285

Answer: 285