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KVPY Sample Paper KVPY Stream-SX Model Paper-27

  • question_answer
    Messages are conveyed by arranging 4 white, 1 blue and 3 red flags on a pole. Flags of the same colour are alike. If a message is transmitted by the order in which the colours are arranged then the total number of messages that can be transmitted if exactly 6 flags are used is -

    A) 45

    B) 65   

    C) 125      

    D) 185

    Correct Answer: D

    Solution :

    Consider 4 alike + 2 others alike, 4A +2 different \[3A+3\,\,OA\] and \[3A+2\,\,OA+1\] different \[\Rightarrow 15+30+20+120\]


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