Questions asked by Blackpink

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• The co-ordinates of the points A , B , C and D are (0 , -1) , (15 , 2) , (-1 , 2) and (4 , -5) respectively. What the ratio in which CD is divided by AB?
  
• 5 letters in each of 3 rings of a lock are printed. If the lock can be opened by only one permutation of three letters, then find the number of permutations by which the lock cannot be opened? ps: by locks it meant those locks we have in ourbriefcase
  
• The point P lies on the line #x-3y=2# and at equal distance from the two points (2,3) and (6,-5). Find the co-ordinates of P?