Hello student on the official website of RCM College its not mentioned that 100% summer internship but as its a part of the course student need to do it in their second trimester. Around 200 organisations  participate in summer internship, its also mentioned that on an average each and every students get two option to choose from. By going through all this yes it's expected that in RCM College Banglore internship placement is 100 percent.

For more updates refer to the link mentioned below - http://www.rcm.ac.in/SummerInternshipProgramme.html

Feel free to comment if you have any doubt

Good luck