how many 7-digit numbers are formed having digit 3 three times and digit 5 four times?

• Ans:35
  Total no of digits Can be arranged=7!
  so =7!/(3!*4!)
• 9 years agoHelpfull: Yes(15) No(2)
• 7! numbers can be formed
• 9 years agoHelpfull: Yes(4) No(2)
• 35
  =7!/(3!*4!)
• 9 years agoHelpfull: Yes(3) No(2)
• 7 digit number _ _ _ _ _ _ _ we have to use only 3 three times and 5 five times but their positions are not matter so there is 7 places to place 3 and 4 places to place 5 and vice versa so it is 7!/(3!*4!)=35
• 8 years agoHelpfull: Yes(2) No(0)
• the ans must be 7!/(3!*4!) =35
• 8 years agoHelpfull: Yes(1) No(0)
• 288 2!*3!*4!
• 9 years agoHelpfull: Yes(0) No(1)
• 7 digit number can arranged in 7! ways. In this 3 occurs 3 times and 5 occurs 4 times ... so answer is 7! / (3! * 4!)
• 8 years agoHelpfull: Yes(0) No(0)