Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1,what is the ratio of US to British stamps?
A. 5:1
B. 10:5
C. 15:2
D. 20:2
E. 25:2
সঠিক উত্তরঃ
D.
20:2
Explanation:
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