1.

In an amalgam, mercury and silver are in the ratio of 3 ∶ 7. In the second amalgam, the ratio of same elements is 1 ∶ 9. If equal quantities of these two amalgam are mixed to form a new amalgam, then what will be the ratio of both of these elements in the new amalgam?

A. 1 ∶ 4
B. 7 ∶ 81
C. 4 ∶ 15
D. 2 ∶ 7
Answer» B. 7 ∶ 81


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