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jee king king Grade: 12
        

There are 720 permutations of digits 1,2,3,4,5,6. suppose these permutations are arranged from smallest to largest numerical values, begginning from 123456 and ending with 654321. what no falls on the 124th position?

8 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear jee king


total number that start with 1 is =5! =120


so at 121 position  213456 come


  122 position  213465 come


 123 position  213546 come


 124 position  213564 come






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Badiuddin

8 years ago
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