allery80 ആളുകളിൽ നടത്തിയ ഒരു സർവേയിൽ, 45 ചായയും, 35 കാപ്പിയും, 10 രണ്ടും കുടിക്കുന്നു. എത്ര പേർ കാപ്പി മാത്രം കുടിക്കുന്നു?
A15
B20
C25
D35
Answer & Solution
Correct answer: C. 25
കാപ്പി മാത്രം = n(കാപ്പി) - n(ചായ ∩ കാപ്പി) = 35 - 10 = 25.
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