SOLUTION: 7 Pink, 5 Black, 11 Yellow balls are there. Minimum no. atleast to get one black and yellow Ball?

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Question 497385: 7 Pink, 5 Black, 11 Yellow balls are there. Minimum no. atleast to get one black and yellow
Ball?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
You could draw all 7 pink balls and 11 yellow balls before finally drawing a black ball, so 19 balls are required before a black & yellow combination is guaranteed.