Unable to install skype on Ubuntu 16.04 64 Bit - Failed to fetch / Hash sum mismatch

Question

I installed Ubuntu 16.04 LTS 64 Bit . I am unable to install Skype . It gives me the following error .

E: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/pool/main/g/gcc-5/cpp-5_5.4.0-6ubuntu1~16.04.1_amd64.deb  Hash Sum mismatch
E: Failed to fetch http://bd.archive.ubuntu.com/ubuntu/pool/main/g/gst-plugins-base1.0/libgstreamer-plugins-base1.0-0_1.8.2-1ubuntu0.1_amd64.deb  Hash Sum mismatch

I have seen Trouble downloading packages list due to a "Hash sum mismatch" error and already tried various commands and operations:

1. I tried sudo apt clean , update , upgrade command .
2. I tried switching the Servers .