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by vaivish » Sun Jun 01, 2008 8:51 am
29. In a jar there are 15 white balls, 25 red balls, 10 blue balls and 20 green balls. How many balls must be taken out in order to make sure we took out 8 of the same color?

a) 8
b) 23
c) 29
d) 32
e) 53
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by kath_the_great4 » Sun Jun 01, 2008 9:57 am
In order to MAKE SURE we have 8 of the same color we we have to take out all of the "other" colors plus 8 of the color with the most marbles

10+15+20+8=53

Is the OA 53?

Low confidence in the answer.
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by sasi78 » Sun Jun 01, 2008 10:11 am
IMO, it is 7*4+1 = 29. what is the OA ??
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by kishore » Sun Jun 01, 2008 10:38 am
Answer: 29

Explanation:
pick 7 balls of each of the 4 colors = 7*4 = 28

so, 8th ball can be from any one of the colors.
Picking this ball will make 8 balls of same color

=> 28+1 = 29
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