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Find the mean proportion between 9 and 64 ?

A25

B24

C27

D35

Answer:

B. 24

Read Explanation:

Letthemeanproportionbe=r.Let the mean proportion be = r.9 : r :: r: 64 9r=r64\frac9r=\frac{r}{64}r2=9×64r^2=9\times64r=3×8=24r=3\times8=24


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