In his pocket , a boy has 3 red marbles , 4 blue marbles , and 4 green marbles , How many marbles will he have to take out of his pocket to ensure that he has taken out at least one of each colour?
A. 3
B. 8
C. 9
D. 11
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সঠিক উত্তরঃ
C.
9
Explanation:
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