Wesley, Ivan and Cooper collected marbles in the ratio of 8 : 5 : 6. After Cooper gave ¹₅ to Wesley and Ivan, Cooper had 195 less marbles than Wesley. The number of marbles that Ivan had increased by 10%. How many marbles did Wesley and Cooper have in the end?

	Wesley	Ivan	Cooper
Before	8 u	5 u	6 u
Change	+ 0.7 u	+ 0.5 u	- 1.2 u
After	8.7 u	5.5 u	4.8 u

Number of marbles that Cooper gave to Wesley and Ivan
= ¹₅ x 6 u
= 1.2 u

Number of marbles that Ivan received from Cooper
= ¹⁰₁₀₀ x 5 u
= 0.5 u

Number of marbles that Wesley received from Cooper
= 1.2 u - 0.5 u
= 0.7 u

Number of less marbles that Cooper had less than Wesley
= 8.7 u - 4.8 u 
= 3.9 u

3.9 u = 195

1 u = 195 ÷ 3.9 = 50

Number of marbles that Wesley and Cooper had
= 8.7 u + 4.8 u
= 13.5 u
= 13.5 x 50
= 675

Answer(s): 675