18. The cost price of an article X is 200% more than that of Y, and 75% less than that of Z. The selling price of the article X is 500% more than that of Z. If the profit on article X is twice that on Y, and is twice the loss on Z, then what is the ratio of profit on article Y to its cost price ?

1. 69 : 8

2. 29 : 4

3. 81 : 8

4. 63 : 4

Correct Answer :