how many 4 digit numbers which are greater than 3000 can be generated by using 4,4,4,4,3,3,3,2,2

• total numbers 51
  solution:
  left most digit is either 3 or 4 ( 2 ways )
  and remaining digits can be 2 or 3 or 4
  so no. of numbers 2 * 3 * 3 * 3 = 54
  but only two 2's can be used so 3222, 4222 are not possible
  and only three 3's can be used so 3333 is not possible
  54 - 3 = 51 ways
  
  
• 13 years agoHelpfull: Yes(3) No(2)