There are 5 captains in total. Treat the India-Australia pair as one block. Then total arrangements: - Treat (IA) as 1 unit ⟶4 units total ⟶4 ! arrangements - Inside the block, (IA) or (AI) ⟶2 ! arrangements Favorable =4!×2=24×2=48 Total possible arrangements =5!=120 Probability: ‌