Ishan Institute of Management and Technology, Greater Noida for the course of BCA.

Sorry, I couldn't found your mentioned course in the mentioned college. I searched alot.
But other than that in majority of good colleges and universities ask maths as a compulsory subject if you want to take admission in BCA course.

Try searching ITS college mohan nagar, Noida. They have 3 or 4 institutions, maybe that's why you couldn't have found that.

Okay.
It is actually Institute of Technology and Science.
So, as per the information made available by them on their site for eligibility for BCA, they say; Candidate seeking admission for the program should have cleared 10+2 examination from any recognized board or any other equivalent board.
Procedure:
They short list students on the basis of there 10th & 12th marks. If selected then, Candidate has to appear for an extensive interview.

I hope now this clarifies all of your doubts.

Absolutely and thanks for helping me in your busy schedule.