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

Colours	Points
Yellow	3
Brown	6
Gold	9

In each container, the number of yellow beads was 20% more than the number of gold beads and 50% less than the number of brown beads. Given that the total possible points if the group managed to collect all the beads were 1080 points, how many beads were not yellow in colour?

Yellow	Brown	Gold
6x1		5x1
1x6	2x6
6 u	12 u	5 u

	Yellow	Brown	Gold	Total
Number	6 u	12 u	5u
Value	3	6	9
Total value	18 u	72 u	45 u	135 u

100% + 20% = 120%
120% = ¹²⁰₁₀₀ =⁶₅

100% - 50% = 50%
50% = ⁵⁰₁₀₀ = ¹₂

Total number of points collected
= 18 u + 72 u + 45 u
= 135 u

135 u = 1080

1 u = 1080 ÷ 135 = 8

Number of beads not brown in colour
= 6 u + 5 u
= 11 u
= 11 x 8
= 88

Answer: 88