Hello, 

Some of the good colleges in Mumbai offering BSc IT to candidates having studied +2 with maths are as follows;

St.  Xavier's College, Mumbai

Narsee Monjee College of Commerce & Economics

Patkar-Varde College

Usha Pravin Gandhi College of Management, Mumbai

This is strictly according to the Eligibility Criteria provided by Colleges having Mathematics as a subject at +2 level in their official website.

Thank you!