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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 | |