allery120 लोगों के एक सर्वेक्षण में, 70 लोग सेब पसंद करते हैं और 50 लोग आम पसंद करते हैं; 20 लोग दोनों पसंद करते हैं। कितने लोग केवल सेब पसंद करते हैं?
A50
B60
C30
D40
Answer & Solution
Correct answer: A. 50
केवल सेब पसंद करने वाले = 70 - 20 = 50 लोग, जो सेब वाले वृत्त में हैं लेकिन उभयनिष्ठ भाग से बाहर हैं।
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