Asked by AMT help
There are 3 blue pens, 4 red pens and 5 yellow pens in a box. Without looking, I take pens from the box one by one. How many pens do I need to take from the box to be certain that I have at least one pen of each colour?
A 8
B 9
C 10
D 11
E 12
A 8
B 9
C 10
D 11
E 12
Answers
Answered by
Ravenswood
12
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