rank of the number 3241?(digits cannot be repeated)

• 16
  thousand place is fixed by 2*3! =12 ways
  hundred place is fixed by 2!=2 ways
  10th place is fixed by =1 ways
  unit place also in 1 way so rank=12+2+1+1=16 ans
• 11 years agoHelpfull: Yes(0) No(1)