Nick, Oliver and Clayton collected erasers in the ratio of 11 : 4 : 4. After Clayton gave ⁷₁₀ to Nick and Oliver, Clayton had 212 less erasers than Nick. The number of erasers that Oliver had increased by 50%. How many erasers did Nick and Clayton have in the end?

	Nick	Oliver	Clayton
Before	11 u	4 u	4 u
Change	+ 0.8 u	+ 2 u	- 2.8 u
After	11.8 u	6 u	1.2 u

Number of erasers that Clayton gave to Nick and Oliver
= ⁷₁₀ x 4 u
= 2.8 u

Number of erasers that Oliver received from Clayton
= ⁵⁰₁₀₀ x 4 u
= 2 u

Number of erasers that Nick received from Clayton
= 2.8 u - 2 u
= 0.8 u

Number of less erasers that Clayton had less than Nick
= 11.8 u - 1.2 u 
= 10.6 u

10.6 u = 212

1 u = 212 ÷ 10.6 = 20

Number of erasers that Nick and Clayton had
= 11.8 u + 1.2 u
= 13 u
= 13 x 20
= 260

Answer(s): 260