allery200 குடும்பங்களைக் கொண்ட ஒரு கிராமத்தில், 120 குடும்பங்களுக்குப் பசுக்களும், 90 குடும்பங்களுக்கு ஆடுகளும் உள்ளன; 30 குடும்பங்களுக்கு இரண்டுமே உள்ளன. இரண்டில் எதையுமே கொண்டிராத குடும்பங்கள் எத்தனை?
A20
B10
C30
D40
Answer & Solution
Correct answer: A. 20
குறைந்தபட்சம் ஒன்றை வைத்துள்ள குடும்பங்கள் = 120 + 90 − 30 = 180, எனவே 200 − 180 = 20 குடும்பங்கள் எதையுமே கொண்டிருக்கவில்லை.
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