Pierre, Owen and Curry collected erasers in the ratio of 10 : 5 : 7. After Curry gave ³₁₀ to Pierre and Owen, Curry had 67 less erasers than Pierre. The number of erasers that Owen had increased by 10%. How many erasers did Pierre and Curry have in the end?

	Pierre	Owen	Curry
Before	10 u	5 u	7 u
Change	+ 1.6 u	+ 0.5 u	- 2.1 u
After	11.6 u	5.5 u	4.9 u

Number of erasers that Curry gave to Pierre and Owen
= ³₁₀ x 7 u
= 2.1 u

Number of erasers that Owen received from Curry
= ¹⁰₁₀₀ x 5 u
= 0.5 u

Number of erasers that Pierre received from Curry
= 2.1 u - 0.5 u
= 1.6 u

Number of less erasers that Curry had less than Pierre
= 11.6 u - 4.9 u 
= 6.7 u

6.7 u = 67

1 u = 67 ÷ 6.7 = 10

Number of erasers that Pierre and Curry had
= 11.6 u + 4.9 u
= 16.5 u
= 16.5 x 10
= 165

Answer(s): 165