When I try to download apps why do I get the error messages saying my memory is out but I have almost 3.5 gb of free space?

[AC Question]

out of memory

I rooted my Samsung galaxy grand Quattro, after that I tried to install apps from google play store , but it shows out of memory, but there is almost 3.5gb internal memory free. After rooting I deleted some of the pre installed apps. Please help me to recover this problem.