mr n mrs smith had invited 9 frnds n their spouse .the stand for photography if mr smith never stand next to mrs smith then how many ways groups arrange in a row

• answer is 18*19!
• 11 years agoHelpfull: Yes(4) No(0)
• 20!-2*19!=20*19!-2*19!=19!(20-2)=18*19!
• 11 years agoHelpfull: Yes(4) No(0)
• 11!-10! will be the ans
• 11 years agoHelpfull: Yes(0) No(1)
• total no of people including mr n mrs smith are 20
  
  20!-19!
• 11 years agoHelpfull: Yes(0) No(2)