What should replace '?' in the equation given below?
​$$5\frac{10}{17}\div 7\frac{12}{34}-\frac{3}{25}=(?)^2$$​​

Correct option is A

Given:
Equation: $$5\frac{10}{17}\div 7\frac{12}{34}-\frac{3}{25}=(?)^2$$​​
Solution:
​$$5\frac{10}{17}\div 7\frac{12}{34}-\frac{3}{25} \\ \ \\= \frac{95}{17}\div \frac{125}{17}-\frac{3}{25}\\ \ \\= \frac{95}{17}\times \frac{17}{125}-\frac{3}{25}\\ \ \\= \frac{95}{125}-\frac{3}{25}\\ \ \\= \frac{19}{25}-\frac{3}{25}\\ \ \\= \frac{16}{25}$$​​
Equate to the squared unknown:
​$$?^2 = \frac{16}{25}$$​​
? = $$\frac{4}{5}$$​​
Final Answer
So the correct answer is (a)