between numbers 10 to 99 how many numbers can be formed with the combinations of 0,1,2,3,4

• with repetition, 4*5 = 20 nos are possible if 10 is to be considered.
  If 10 is not considered , then 19.
  without repetition, 4*4 = 16 nos are possible if 10 is to be considered.
  If 10 is not considered , then 15.
• 12 years agoHelpfull: Yes(5) No(1)
• 19 numbers can be formed. (with repetition)
  15 numbers can be formed. (Without repetition)
  
  They are,
  11 12 13 14 20 21 22 23 24 30 31 32 33 34 40 41 42 43 44 (With repetition)
  
  12 13 14 20 21 23 24 30 31 32 34 40 41 42 43 (Without repetition)
• 12 years agoHelpfull: Yes(1) No(2)
• @ Pargat
  
  In the qn itself they give between 10 t0 99. then how 10 is consider??
• 12 years agoHelpfull: Yes(1) No(3)
• total 28 possiblities-5 possiblities with 0 -1 possibliti with 1=22
  
• 10 years agoHelpfull: Yes(0) No(0)