one line has 10 dots and second line has 8 dots.how many triangles can be made with the help of these dots?

• 10c2*8c1 + 10c1*8c2 = 640
• 10 years agoHelpfull: Yes(87) No(0)
• If both the lines are parralel to each other-
  we can solve by -
  (10c2*8c1) + (10c1*8c2) = 640
  Hence, total triangles that can be made using dots = 640
• 10 years agoHelpfull: Yes(25) No(0)
• 18C3-10C3-8C3
• 10 years agoHelpfull: Yes(14) No(3)
• It can also be solved as 18c3 - 10c3 - 8c3=640
• 10 years agoHelpfull: Yes(6) No(1)
• 640 traingles simply combination question
  
• 10 years agoHelpfull: Yes(1) No(2)
• 100/5=20
  20/5=4
  4 can not be divisible by 5 that is remainder part end we get 0
  So, 20+4=24 zeros
• 10 years agoHelpfull: Yes(1) No(1)
• 640 triangles.
• 10 years agoHelpfull: Yes(1) No(2)
• 8c1*10c2+10c1*8c2 = 640 triangles
• 10 years agoHelpfull: Yes(0) No(0)