allery100 ଜଣ ଛାତ୍ରଛାତ୍ରୀଙ୍କ ଏକ ଗୋଷ୍ଠୀରେ, 60 ଜଣ କ୍ରିକେଟ୍ ଖେଳନ୍ତି, 50 ଜଣ ଫୁଟବଲ୍ ଖେଳନ୍ତି ଏବଂ 20 ଜଣ ଉଭୟ ଖେଳନ୍ତି। କେତେ ଜଣ କୌଣସି ଖେଳ ଖେଳନ୍ତି ନାହିଁ?
A10
B20
C30
D40
Answer & Solution
Correct answer: A. 10
Union = n(C) + n(F) - n(C ∩ F) = 60 + 50 - 20 = 90. କୌଣସି ଖେଳ ଖେଳୁ ନ ଥିବା ଛାତ୍ରଛାତ୍ରୀ = 100 - 90 = 10.
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