A Shopkeeper gives 2 articles free on the purchase of every 10 articles. He also allows a discount of 20% to customer and still earn 25% profit. Find the ratio of the cost price to the marked price of the article?

Statements: Q ≤ R < A; R ≥ N > S; S ≥ T > U

Conclusions:

I. A > N

II. U < N

III. S ≥ Q

Statements: L > M > Z ≥ S < R = O < N

Conclusion 

I. N ≥ L                 

II. L > S

Statements: N > U < I ≤ R < D < A; K ≥ O = G > X = E > A

Conclusions:

I. R < E

II. K > D

III. U ≥ X

Statements:

C > D ≥ E ≤ F; Y ≥ Z ≥ A = C

Conclusion:

I. Y > F

II. F ≥ Y

Statements: K * D, D $ N, N % M, M © W

Statements: Q ≥ B > G = F ≥ J; W ≤ B = N < L.

Conclusions:

I. N > J

II. Q > L

Statements:

L ≤ J ≤ C = N; W ≥ X > L

Conclusions:

I. J ≤ X

II. X ˃ W

Statements: V & T, T # L, L $ Z, Z @ A

Conclusions: I. Z $ T                         II. Z & T