There is a saying, "A Single Sheet of Paper cannot Determine My Future", and we all casually use it as an excuse for low marks. Well, in fact the statement is true.
And I believe that MNCs are smart enough to understand the meaning. Let me explain. There are people who gets great marks and finds it difficult to work under the given conditions, and there are people with average or lesser marks who does well in work and almost all companies know this. So, don't be afraid due to low marks.
Then what does really matters? Well there is a host of things that came to be taken care of. This includes communication skills, presenation skill, stress management, and lot more. And the employers put weight on these more than marks to an extend. Who knows, marks can be obtained by cheating but not these stuffs can be.
Does that mean marks mean nothing? Absolutely not, marks are needed, and it can help us to get chances easily. Consider the situation for instance. You can contact someone via a feature phone. But then there are smartphones which also serves the purpose, but in a better manner, say Internet, voice mails, etc. So, marks helps you in having a good first impression, and then it's all in your personal skills anyway.
Before winding up, just one more thing. Your marks have a huge difference in tenth and plus two, which will be almost a sure concern. Be prepared with the reason of that bug difference, hope you got something genuine.
All The Best!!