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ഒരു ക്ലാസ്സിലെ 40 കുട്ടികളുടെ ശരാശരി വയസ്സ് 14 ആണ്, ടീച്ചറേയും കണക്കിലെടുത്താൽ ക്ലാസ്സിലെ ശരാശരിഒന്ന് കൂടുന്നു. എങ്കിൽ ടീച്ചറുടെ വയസ്സ് എത്ര?

A50

B55

C54

D51

Answer:

B. 55

Read Explanation:

ക്ലാസ്സിലെ 40 കുട്ടികളുടെ ശരാശരി വയസ്സ് =14 കുട്ടികളുടെ വയസ്സുകളുടെ തുക =560 ടീച്ചറുടെ വയസ്സുകൂടെ ഉൾപ്പെടുത്തിയാൽ ശരാശരി =15 ടീച്ചറുടെ വയസ്സുകൂടെ ഉൾപ്പെടുത്തിയാൽ തുക = 615 ടീച്ചറുടെ വയസ്സ് = 615 - 560 = 55


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