Total number of 6-digit numbers in which only and all the five digits 1, 3, 5, 7 and 9 appear, is:

Question:

Total number of 6-digit numbers in which only and all the five digits $1,3,5,7$ and 9 appear, is:

  1. $\frac{1}{2}(6 !)$

  2. 6 !

  3. $5^{6}$

  4. $\frac{5}{2}(6 !)$

Correct Option: 4

JEE Main Previous Year 1 Question of JEE Main from Mathematics Permutations And Combinations chapter.
JEE Main Previous Year Jan. 7, 2020 (I)

Solution:

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