JEE Main 2025 Mathematics question
From all the English alphabets, five letters are chosen and are arranged in alphabetical order. The total number of ways, in which the middle letter is 'M', is :
Answer: (4)
Solution
Choose 2 letters from 12 before M and 2 from 13 after M: ¹²C₂ × ¹³C₂ = 66 × 78 = 5148.