x, x+2, x+4, x+6 എന്നിവയുടെ ശരാശരി 9 ആയാൽ x ന്റെ വില?
A6
B8
C7
D5
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ഒരു ക്ലാസിലെ 40 കുട്ടികളുടെ ശരാശരി ഭാരം 50 kg. പുതുതായി 10 കുട്ടികൾ വന്നപ്പോൾ ശരാശരി 4 kg വർദ്ധിച്ചു. എങ്കിൽ പുതുതായി വന്ന കുട്ടികളുടെ ശരാശരി ഭാരം ?
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