​Simplify the following 

0.$$\bar1$$ + 0.$$\bar5$$ 

Correct option is D

Given: 

​$$0.\bar1+0.\bar5$$  

Concept Used: 

if $$0.\overline p$$ , then, in fraction form  $$\frac{p}{9}$$​​

Solution: 

​$$\frac19+\frac59$$ 

= $$\frac{1+5}9$$ 

= $$\frac69$$ 

= $$\frac23$$