ഒരു ക്ലാസ്സിലെ 30 കുട്ടികളുടെ ശരാശരി ഉയരം 105 സെ.മീ. ആണ്. ശരാശരി ഉയരം 112 സെ.മീ.
ഉള്ള 20 കുട്ടികൾ കൂടി ആ ക്ലാസ്സിൽ ചേർന്നാൽ ശരാശരി ഉയരം എന്ത് ?
A107.8
B108.5
C110
D107
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