By using the letters A, E, O, E, P, Q, T, S, how many words can be formed, if we have to place all the vowels in even places

• Vowels can placed only even places: 4!...
  But 'e' comes twice, so 4!/2! = 12...
  other 4 letters can placed in 4! ways
  
  so, 12*4! = 288 formations.
  
  hope this solution is helpful
  
• 12 years agoHelpfull: Yes(3) No(1)
• vowels together=4! bt 2 e are der so 2!
  4!/2!=12
  nd remaining 4! so total 12*4!=288
• 12 years agoHelpfull: Yes(2) No(0)
• the num of places for vowels are 4 and 'e' is repeated so, vowels can be placed in 4!/2! ways=12 ways
  now, the consonants can be placed in remaining 4 positions in 4! ways=24 ways
  so, ans is 12X24=288
• 12 years agoHelpfull: Yes(1) No(1)