how many words can be formed by re arranging the letters of the word 'problems' such that p and s occupy the first and last positions respectively?

• middle six position can be filled with =6*5*4*3*2*1=720 ways
  so 720 words can be formed.
• 12 years agoHelpfull: Yes(41) No(2)
• no of letters = P R O B L E M S = 8 letters
  P and S occupy first and last position so middle 6 position can be filled
  = 6 x 5 x 4 x 3 x 2 x 1 = 6!
  now subtract one word "problems"
  so tatal word can formed = ( 6!-1 ) = 719 ans
• 12 years agoHelpfull: Yes(20) No(23)
• 6! p and s can not change but other 6 can arranging so 6!
  
• 12 years agoHelpfull: Yes(0) No(2)
• ans will be 1440.. as middle 6 numbers can be arranged in 6!way and remaining pand s can be arranged in 2 ways therefore 720*2=1440
• 11 years agoHelpfull: Yes(0) No(0)