Q33 / 90 · JEE Main 2024 (27 Jan Shift 2) · Mathematics

Let α=(4!)!(4!)3! and β=(5!)!(5!)4!. Then :

  • A
    α∈N and β∉N
  • B
    α∉N and β∈N
  • Correct answer
    C
    α∈N and β∈N
  • D
    α∉N and β∉N

Solution

Given: α=(4!)!(4!)3!, β=(5!)!(5!)4!

⇒α=(24)!(4!)6, β=(120)!(5!)24

If 24 distinct objects are divided into 6 groups of 4 objects in each group, then the number of ways of formation of group is=24!(4!)6.6!∈N

Similarly, let 120 distinct objects are divided into 24 groups of 5 objects in each group.

So, the number of ways of formation of groups

=(120)!(5!)24·24!∈N

Hence, the correct answer is option: 'C'.

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