1.

What is the ratio of mean proportional between 1.8 and 3.2 and the third proportional of 5 and 3?

A. 3 ∶ 5
B. 4 ∶ 3
C. 3 ∶ 4
D. 5 ∶ 3
Answer» C. 3 ∶ 4


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