R installation errors on ubuntu 14 04

Question

I'm trying to install R on my ubuntu and I'm having a lot of error.

dev@dev-OptiPlex-780:~$ sudo apt-get install r-base-core
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 r-base-core : Depends: libc6 (>= 2.23) but 2.19-0ubuntu6.9 is to be installed
               Depends: libgomp1 (>= 4.9) but 4.8.4-2ubuntu1~14.04.3 is to be installed
               Recommends: r-recommended but it is not going to be installed
               Recommends: r-base-dev but it is not going to be installed
               Recommends: r-doc-html but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Answer 1

 In /etc/apt/sources.list or one of the /etc/apt/sources.list.d/*.listreplace xenial with trusty and run apt-get update. After that you should be able to update.