alleryA ଏବଂ B ର ୟୁନିଅନ୍ରେ 90 ଜଣ ସଦସ୍ୟ ଅଛନ୍ତି, A∩B ରେ 20 ଜଣ ଏବଂ A ରେ 60 ଜଣ ଅଛନ୍ତି। B ରେ କେତେ ଜଣ ସଦସ୍ୟ ଅଛନ୍ତି?
A50
B70
C30
D40
Answer & Solution
Correct answer: A. 50
90 = 60 + B - 20 ରୁ, B = 50।
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