Find the probability of getting a number with 7 between 100 and 999 (both inclusive).

• no of 7 b/w 100 & 999 =19*8+100=152+100=252
  so probability to gettng no 7 is= 252/899= 0.27ans
• 11 years agoHelpfull: Yes(8) No(1)
• total no are 900
  now total no in which 7 comes is 20*9 + 100 = 280
  so p = 280/900 = 0.031111
• 12 years agoHelpfull: Yes(3) No(5)
• 100-199------19
  similarly for all ranges till 999 except for:
  
  700-799----100
  
  total no.containing 7's= 19*8+100=252
  
  Therefore,
  
  probability=(900-252)/900
  = 648/900
  = 0.72
  
• 8 years agoHelpfull: Yes(2) No(0)