A seven digit number is formed by
using the digits 3, 3, 4, 5, 5, 8 & 9.
Probability that the number formed is
great than 57,26,000 is?

• Num shud be greater than 5726000 for this num shud be start wid 58......=5!/2!=60
  59.....=5!/2!=60
  8......=6!/2!/2!=180
  9......=6!/2!/2!=180
  Total nums greater than 572600=60+60+180+180=480
  And total nuns form by these digits are=7!/2!/2!=1260..
  Probability=480/1260=8/21..
  Ans.. 8/21
• 10 years agoHelpfull: Yes(5) No(0)
• Seven digit numbers using 7 digits..7!..but we have two 3s two 5s..7!*2!*2!
  Nimbers greater than5726000...first place have 2 chances..second place has 1 chnce..remaining have 5*4*3*2*1 chances respectively..but again two 3s..two 5s..2!*2!....total 2*1*5*4*3*2*1*2*2=960
  Probability=960/20160=0.047
• 10 years agoHelpfull: Yes(0) No(2)
• Seven digit numbers using 7 digits..7!..but we have two 3s two 5s..7!*2!*2!
  Nimbers greater than5726000...first place have 4 chances..second place has 2 chnces..remaining have 5*4*3*2*1 chances respectively..but again two 3s..two 5s..2!*2!....total 4*2*5*4*3*2*1*2*2=3840
  Probability=3840/20160=0.19047
• 10 years agoHelpfull: Yes(0) No(1)