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

Colours	Points
Brown	2
Gold	5
Yellow	7

In each container, the number of brown marbles was 20% more than the number of yellow marbles and 90% less than the number of gold marbles. Given that the total possible points if the group managed to collect all the marbles were 1041 points, how many marbles were not brown in colour?

Brown	Gold	Yellow
6x1		5x1
1x6	10x6
6 u	60 u	5 u

	Brown	Gold	Yellow	Total
Number	6 u	60 u	5u
Value	2	5	7
Total value	12 u	300 u	35 u	347 u

100% + 20% = 120%
120% = ¹²⁰₁₀₀ =⁶₅

100% - 90% = 10%
10% = ¹⁰₁₀₀ = ¹₁₀

Total number of points collected
= 12 u + 300 u + 35 u
= 347 u

347 u = 1041

1 u = 1041 ÷ 347 = 3

Number of marbles not brown in colour
= 60 u + 5 u
= 65 u
= 65 x 3
= 195

Answer: 195