9 സംഖ്യകളുടെ ശരാശരി 50 ആണ് . അതിൽ ആദ്യത്തെ നാല് സംഖ്യകളുടെ ശരാശരി 49ഉം അവസാനത്തെ നാല് സംഖ്യകളുടെ ശരാശരി 52 ഉം ആയാൽ അഞ്ചാമത്തെ സംഖ്യ എത്ര ?
A48
B45
C46
D50
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