Am I eligible for campus placements after completing MBA? I have 50% throughout in my academics.

Yes, you can get a good company after MBA degree if you are having good marks in MBA. Because in the management, placement companies do not seek for the percentage in +2 or graduation as they only seek for good percentage in MBA.

Percentage is not important for good firms. If you are good in the respective field you studied you will of course get a good job. Some good companies just look into your ability more than academics.