There are 720 permutations of the digits . Suppose these permutations are arranged from smallest to largest numerical values, beginning from 1 2 3 4 5 6 and ending with 6 5 4 3 2 1. Then the digit in unit place of number at position is |

There are 720 permutations of the digits . Suppose these permutations are arranged from smallest to largest numerical values, beginning from 1 2 3 4 5 6 and ending with 6 5 4 3 2 1. Then the digit in unit place of number at position is |

1 Answer

127 votes

**(6)**

Number of numbers beginning with 1=120

Number of number beginning with 2 =120

Starting with 31………………..=24

Starting with 3214………………..=2

Finally =1

Hence unit place digit of number is6

127 votes

127