ഒരു ക്ലാസ്സിലെ 45 വിദ്യാർത്ഥികളിലെ 25 പേരുടെ ശരാശരി വയസ്സ് 16. ബാക്കിയുള്ള 20 പേരുടെ ശരാശരി വയസ്സ് 16.5 ആണ് .ക്ലാസിലെ ആകെ വിദ്യാർത്ഥികളുടെ ശരാശരി വയസ്സ് എത്ര?
A16.22
B32.5
C16.25
D16.5
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