how many numbers consisting of 5 digits can be formed which the digits 3 , 4 , 7 are used are used only once and the digit 5 is used twice

Dear student
Your question is not clear and appears to be incomplete. Recheck your question and please be a little specific so that we can provide you with some meaningful help. Looking forward to hear from you again!

  • -29
5!/2! . Since exchanging the two 5s gives no change in number.
  • 8
It's 5!/2!. 2! because it has 2 5's.
  • 2
What are you looking for?