https://gyazo.com/e749e751f19d36cc1bfbb9fd3cf28474

Hmm, I think you're correct: \(\frac{13}{35}+\frac{2}{5}=\boxed{\frac{27}{35}}\)

The answer is a, 13/14.

You can look at my other post to find the solution, but here it is anyways.

Case 1: Yes replacements

2/5

Case 2: No replacements

Look at previous post.

I hope this helps,

Gavin