allery50 ارکان کے کلب میں 28 شطرنج، 24 کیرم کھیلتے ہیں اور 8 ان دونوں میں سے کوئی کھیل نہیں کھیلتے۔ دونوں کھیل کھیلنے والے کتنے ہیں؟
A10
B12
C14
D16
Answer & Solution
Correct answer: A. 10
یونین = 50 - 8 = 42۔ دونوں کھیلنا = n(شطرنج) + n(کیرم) - یونین = 28 + 24 - 42 = 10۔
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