The sum of the digits in the unit’s place of all the 4-digit numbers formed by using the numbers 3, 4, 5 and 6, without repetition, is:

Question:

The sum of the digits in the unit’s place of all the 4-digit numbers formed by using the numbers $3,4,5$ and 6 , without repetition, is:

  1. 432

  2. 108

  3. 36

  4. 18

Correct Option: 2

JEE Main Previous Year 1 Question of JEE Main from Mathematics Permutations And Combinations chapter.
JEE Main Previous Year Online April 9, 2014

Solution:

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