what is the probability(approx.) that a four digit no. is a perfect square?
a).0070
b).070
c).0073
d).0076

• first number whose square is four digit number is 32(1024)
  total four digit numbers are (1000 to 9999)9000
  and the last is 99(9801).
  number between these two are 99-32+1=68
  and thus the probability is
  68/9000=0.0075555555556
  hence d is correct answer
• 10 years agoHelpfull: Yes(46) No(1)
• total no. which square's are four digit perfect square- 68
  total no of 4 digit are
  from 1000 to 9999 == 9000
  hence P=68/9000
  p=.007555==0.0076
• 10 years agoHelpfull: Yes(16) No(0)
• answer option d
• 10 years agoHelpfull: Yes(1) No(0)
• =68/9000
  =.007555
  =.0076(approx)
• 10 years agoHelpfull: Yes(0) No(0)