hi,

see the number recruitment of graduation and post graduation may be different for different colleges, but there is many other things which matters a lot, like a good gre or toefel score, letter of recommendation , research experience etc, however if you have any research paper publication done on masters level then it will be a plus point, you need to search in the particular university for your area of interest with fees details and admission process.

Yes you can apply for PhD program, but it mainly depends on which country you are applying, and in which university. Your percentage is low, try to get good marks in your last semester. Generally they require 60% in graduation. And they have Interview for admission, so it depends on your choice of country and their criteria, it's different for different University.