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1. |
If x is subtracted from each of the numbers 20, 37, 54 and 105, then the numbers so obtained in this order are in proportion. What is the mean proportional between (7x - 5) and (x + 6)? |
A. | 12 |
B. | 15 |
C. | 10 |
D. | 18 |
Answer» B. 15 | |