if 6 parallel lines are cut wid another 5 parallel lines,no. of parallelograms formed?

• The number of parallelograms formed =
  (no. of ways of choosing 2|| lines from the set of 6 || lines)*(no. of ways of choosing 2|| lines from the set of 5 || lines)
  
  Now,clearly,
  no. of ways of choosing 2|| lines from the set of 6 || lines =6C2 = 15
  no. of ways of choosing 2|| lines from the set of 5 || lines =5C2 = 10
  
  So,thee number of parallelograms formed = 15*10 = 150
  
  So,150 parallelograms will be formed.
  
  Thanks to all..:-):-)
• 12 years agoHelpfull: Yes(28) No(3)
• 6 parallel lines are cut with another 5 parallel lines,
  no. of parallelograms formed=(6-1)*(5-1)
  = 20
  
  
  
  
  
  
  
  
  
  
  (
• 12 years agoHelpfull: Yes(6) No(10)
• 6 parallel lines are cut with another 5 parallel lines,
  no. of parallelograms formed=(6-1)*(5-1)
  = 20
  
• 11 years agoHelpfull: Yes(1) No(1)