IIM Mumbai PI is moderately harder than IIM Lucknow but easier than IIM Calcutta based on March 2026 Kolkata interview comparisons. IIM C at Joka campus asked deeper quant (probability, normal distribution, Bayes theorem) and consumer tech depth; IIM M asked engineering basics and current affairs; IIM L asked current affairs and state politics. IIM Mumbai at Rs 23L fees and Rs 22 LPA average runs balanced PIs with mix of friendly and probing questions. For engineer candidates, IIM M's engineering questions are more demanding than L but less quant-heavy than C. For non-engineer candidates, IIM L's current affairs is tougher than M's but similar to C's behavioral questioning. Panel friendliness varies: IIM M's March 2026 Kolkata panel had 2 female panelists described as friendly, while IIM C's Joka panel had mixed tones (1 friendly, 2 stern). Preparation equally for all three: (