find the chance of drawing 2 balls in succession from a bag contains 5 red and 7 blue balls,if the balls are not being replaced.

• Answer is 7/22,
  7/12 *6/11
• 7 years agoHelpfull: Yes(1) No(0)
• All the cases without replacement of drawing will be
  (First 1 red & then 1 blue) or (First 1 red & then 1 red) or (First 1 blue & then 1 red) or (First 1 blue & then 1 blue) which can be written as
  (5/12)*(7/11) + (5/12)*(4/11) + (7/12)*(5/11) +(7/12)*(6/11) = 1
• 9 years agoHelpfull: Yes(0) No(2)
• 5times-1red ball and 1blue ball each and next time 2 blue balls
  ans:6
• 7 years agoHelpfull: Yes(0) No(2)