CMAT Progressions and Series Questions

What is the 95th term of the following letter series?
A, A, B, B, B, B,C, C,C, C,C, C, D, D, D, D, D, D, D, D, E, ...

Find the sum ofthe following series (with infinite terms):
$$2\sqrt{2},\frac{4}{\sqrt{3}},\frac{4\sqrt{2}}{3},.....$$

The geometric mean proportion between  $$30 + \sqrt200$$ and $$54 - \sqrt648$$ is: