alleryA ಮತ್ತು B ಒಕ್ಕೂಟವು 90 ಸದಸ್ಯರನ್ನು ಹೊಂದಿದೆ, A∩B ಒಕ್ಕೂಟವು 20 ಅನ್ನು ಹೊಂದಿದೆ ಮತ್ತು A ಒಕ್ಕೂಟವು 60 ಅನ್ನು ಹೊಂದಿದೆ. B ಎಷ್ಟು ಸದಸ್ಯರನ್ನು ಹೊಂದಿದೆ?
A50
B70
C30
D40
Answer & Solution
Correct answer: A. 50
90 = 60 + B - 20, B = 50 ನಿಂದ.
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