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ഒരു നിരയിൽ X മുന്നിൽ നിന്നും ഒൻപതാം സ്ഥാനത്തും Y പിന്നിൽനിന്നും നാലാംസ്ഥാനത്തുമാണ്. X ൽ നിന്നും മൂന്നാം സ്ഥാനം പിന്നിലാണ് Y എങ്കിൽ ആ നിരയിൽആകെ എത്ര പേരുണ്ട് ?

A15

B13

C14

D16

Answer:

A. 15


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