JEE Main Mathematics question
The number of numbers of distinct digits such that all the digits in the first four places are less than the digit in the middle and all the digits in the last four places are greater than that in the middle is
Answer: (B)
Solution
The nine distinct digits are ; the middle (fifth) digit must exceed the four before it and be smaller than the four after it. So the middle digit is the fifth smallest, ; the first four places hold in ways and the last four hold in ways. The
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account