1.

$$\sqrt {\frac{{25}}{{81}} - \frac{1}{9}}= ?$$

A. $\frac{2}{3}$$
B. $\frac{4}{9}$$
C. $\frac{{16}}{{81}}$$
D. $\frac{{25}}{{81}}$$
Answer» C. $\frac{{16}}{{81}}$$


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