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
Grey	3
Blue	4
Gold	7

In each container, the number of grey marbles was 80% more than the number of gold marbles and 70% less than the number of blue marbles. Given that the total possible points if the group managed to collect all the marbles were 1274 points, how many marbles were not grey in colour?

Grey	Blue	Gold
9x1		5x1
3x3	10x3
9 u	30 u	5 u

	Grey	Blue	Gold	Total
Number	9 u	30 u	5u
Value	3	4	7
Total value	27 u	120 u	35 u	182 u

100% + 80% = 180%
180% = ¹⁸⁰₁₀₀ =⁹₅

100% - 70% = 30%
30% = ³⁰₁₀₀ = ³₁₀

Total number of points collected
= 27 u + 120 u + 35 u
= 182 u

182 u = 1274

1 u = 1274 ÷ 182 = 7

Number of marbles not grey in colour
= 30 u + 5 u
= 35 u
= 35 x 7
= 245

Answer: 245