There is a ticket numbering 1,2,3.........,1100.Find the probability how many times 2 digit occur in when we get the ticket.

• ans =290/1100
  explanation=>
  between 1 to 99=19 distinct numbers contain 2.(count number 22 as 1 case)
  100 to 199=19
  200 to 299=100(every number has 2)
  remaining all contains 19 in every 100 set
  so
  so 1 to 1100=19*10+100=290
  hence
  290/1100 is the answer
  
• 8 years agoHelpfull: Yes(13) No(3)
• every consecutive 100 no contain 20 times each digit...
  so
  1-99=20 times two digit
  100-199= 20 times two digit
  300-400= 20 times two digit
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  1000-1100= 20 times two digit so total=20*10= 200 times
  for 200-299= occurence of 2 in hundres place is 100, rest occurence will be 20 times so total of 2 digit in 200-299=120 times
  therefor total occurence=200+120=320
  so probability is 320/1100=16/55
• 8 years agoHelpfull: Yes(12) No(4)
• 29/110
  1-100 19 times 2digits are coming like that upto 1100 we calculate 10 times.200-299 it occurs 100 times.
• 8 years agoHelpfull: Yes(4) No(2)
• probability-320/1100
• 8 years agoHelpfull: Yes(1) No(0)
• For 1-100 the number of 2 is 20,,(10 2's in unit digit & 10 2's in tens digit)
  So for every 100s there will be 20 2's,, in 200 there are 100 2's,, so total number of 2's between 1-1100 is 11*20+100=320
• 8 years agoHelpfull: Yes(0) No(0)
• from 1-100 2 comes in 19 digits and this pattern ,and in 200 to 300 it comes 100 times so,19 is repeated 10 times +100 times so total times is 190+100=290/1100 thus 29/110
• 8 years agoHelpfull: Yes(0) No(0)