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
Brown	3
Green	4
Pink	7

In each container, the number of brown balls was 40% more than the number of pink balls and 50% less than the number of green balls. Given that the total possible points if the group managed to collect all the balls were 448 points, how many balls were not brown in colour?

Brown	Green	Pink
7x1		5x1
1x7	2x7
7 u	14 u	5 u

	Brown	Green	Pink	Total
Number	7 u	14 u	5u
Value	3	4	7
Total value	21 u	56 u	35 u	112 u

100% + 40% = 140%
140% = ¹⁴⁰₁₀₀ =⁷₅

100% - 50% = 50%
50% = ⁵⁰₁₀₀ = ¹₂

Total number of points collected
= 21 u + 56 u + 35 u
= 112 u

112 u = 448

1 u = 448 ÷ 112 = 4

Number of balls not brown in colour
= 14 u + 5 u
= 19 u
= 19 x 4
= 76

Answer: 76