allery80 ଜଣ ଲୋକଙ୍କ ଏକ ସର୍ବେକ୍ଷଣରେ, 45 ଜଣ ଚା' ପିଅନ୍ତି, 35 ଜଣ କଫି ପିଅନ୍ତି ଏବଂ 10 ଜଣ ଉଭୟ ପିଅନ୍ତି। କେତେ ଜଣ କେବଳ କଫି ପିଅନ୍ତି?
A15
B20
C25
D35
Answer & Solution
Correct answer: C. 25
କେବଳ କଫି = n(Coffee) - n(Tea ∩ Coffee) = 35 - 10 = 25.
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