maths probability

a box contains 20 red,30 black,40 blue,50 white. what will be the minimum number of balls to be drawn without replacement so that you are certain about getting 4 red,5 black,6 blue,7 white balls?
A.140
B.97
C.104
D.124

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asked by my era
  1. Answered by MathMate a few days ago under a Physics heading

    http://www.jiskha.com/display.cgi?id=1403632512

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    posted by Reiny

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