There are 9 balls of which one is defective. What are the minimum number of chances required to find the defective one?

• 2...
  9 balls are divided into 3 groups as: ooo ooo oo*
  last group is selected,u will get the defective ball.
• 9 years agoHelpfull: Yes(6) No(7)
• 1/9 they are asking for minimum no of chances so there might be a chance to get the defective one in first attempt itself so the ans is 1/9
• 9 years agoHelpfull: Yes(6) No(2)
• minimum no of chances means , the 1st ball u pick up is the defective one, so Ans =1/9.
  if maximum no . of chances asked then last ball bill be defective one, so Ans=9C1=9
• 9 years agoHelpfull: Yes(6) No(1)
• 9C1 i.e 9 chances
• 9 years agoHelpfull: Yes(4) No(1)
• I think 9c1=9
• 9 years agoHelpfull: Yes(3) No(2)
• 1^2 + 1=2
  2^2 +1=5
  5^2+1 =26
  26^2+1=677
• 9 years agoHelpfull: Yes(2) No(4)
• 8. Out of 9, 1 is defective. If you examine 5 or 3 balls and found them to be not defective, you still have not found the defective one. But if you pick eight and found them to be not defective, the one you didnt pick is defective.
  
• 9 years agoHelpfull: Yes(2) No(2)
• Plzz give me the solution
• 8 years agoHelpfull: Yes(0) No(0)
• Correct answer is 3
• 8 years agoHelpfull: Yes(0) No(2)
• 2 is right
• 7 years agoHelpfull: Yes(0) No(1)