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A box has 2 marbles each of red, blue yellow and green colours. The box is kept in a dark room where the colours of the marbles cannot be distinguished. A boy wants 2 marbles of the same colour. How many different marbles he must draw from the box so that he is sure that he has got 2 marbles of the same colour ?
Correct Answer: (a)
Official keyThis question appeared in the CGPSC Prelims 2011 examination (GS). It is Question 131 out of 150 questions in this paper.
This question was part of the CGPSC Prelims 2011 (GS). The CGPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all CGPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.