My mother is twice as old as my brother. I am 5 years younger to my brother, but 3 years older to my sister. If my sister is 12 years of age how old is mother?
A30
B54
C40
D46
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ഒരു ക്ലാസിലെ 35 കുട്ടികളുടെ ശരാശരി വയസ് 11 ആണ്. ടീച്ചറേയും കൂടി ചേർത്തപ്പോൾ ശരാശരി വയസ് 12 ആയി. ടീച്ചറുടെ വയസ് എത്ര ?
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