There are 100 balls in a box. 20 are blue, 20 are red, 20 are black, and 20 are white and 20 orange. Find the least no of ways to get the pair of balls.

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rekha

  • Feb 1st, 2006
 

950

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sharathg84

  • Feb 3rd, 2006
 

There are 5 different colored Balls in the bag. As a worst possible case, let us assume that you pick up all 5 different colors in your first 5 picks. So, the next time (6th pick) you pick up a ball, you are absolutely sure that the ball would have one of the five colors. Now you can pair it with any one ball picked by you earlier. So, the Answer is 6 ways.

tamilselvan

  • Feb 4th, 2006
 

answer is 10

4+3+2+1 = 10

 

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edsel

  • Feb 8th, 2006
 

 6

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prasanth

  • Mar 16th, 2006
 

in five picks we get 5 different balls in 6 th pic up diffently we get pair so ans is 6

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Munish Sharma

  • May 5th, 2006
 

I agree with the answer as- 5c2=10

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sravanthi

  • Aug 3rd, 2006
 

hi selvan,can u plz explain the ans

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suresh

  • Sep 25th, 2006
 

u r right

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pankaj

  • Dec 12th, 2006
 

No.Simply the correct ans is 6.B'coz even in worst case the 6th ball willmake a pair with one of the previous balls.

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mishi

  • Sep 12th, 2007
 

6 will be the answer

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tamil_cmc

  • Apr 26th, 2008
 

answer is 104+3+2+1 = 10Total five colorsthe first color can pair with 4 other colorsand next clor can match with 3 colors and so on ...So possible least number of pairs will be 10.

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