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KVPY Sample Paper KVPY Stream-SX Model Paper-10

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


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