alleryسیٹ A میں 30 اراکین ہیں اور سیٹ B میں 20 ہے، 8 دونوں میں مشترک ہے۔ A یا B میں کتنے ہیں؟
A42
B50
C58
D38
Answer & Solution
Correct answer: A. 42
یونین ہے 30 + 20 - 8 = 42، چونکہ مشترکہ اراکین کو رقم میں دو بار شمار کیا جاتا ہے۔
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