30 പേരുടെ ശരാശരി ഭാരം 60 kg ആണ്. കൂട്ടത്തിൽ നിന്ന് ഒരാളെ മാറ്റിയപ്പോൾ ശരാശരി ഭാരം 60.5 kg ആയി. എങ്കിൽ മാറിയ ആളുടെ ഭാരം എത്രയാണ് ?
A50
B45.6
C45.5
D45.6
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