CMI does not disclose its cutoff marks for the exam. Since there are two parts, you may expect around 28-30 marks cutoff for part 1 (out of 40) and around 35-40 marks for part 2 (out of 60). So, the total cutoff marks are around 60-65 out of 100 marks question paper. But the fact is they will check part 2 (Subjective questions) only if you clear the cutoff for part 1 i.e., integer type questions' part.