) the figure shown is an equilateral triangle of side length equal to 5 which is divided into 2unit traingles. A valid path is a path from the triangle in the top row to the row to the middle triangle in the bottom row, such that the adjacent triangles in the 4path share a common edge and the path never travels up (from lower row to higher row) or revisits a triangle. An example of such path is illustrated below. How many valid paths are possible?
a)23 b)16 c)120 d)24

• (n-1)!
  n=5
  hence,(n-1)!=(5-1)!
  Ans is 24...
• 12 years agoHelpfull: Yes(8) No(3)
• please give proper explanation........
• 12 years agoHelpfull: Yes(5) No(1)
• please explain this answer!!
• 12 years agoHelpfull: Yes(3) No(1)
• 6*2*2=24.....
  thats all.....
• 8 years agoHelpfull: Yes(1) No(0)