allery50 طلباء کے گروپ میں 30 کو نیلا، 25 کو سبز رنگ پسند ہے اور 10 کو ان میں سے کوئی رنگ پسند نہیں۔ دونوں رنگ پسند کرنے والے کتنے ہیں؟
A10
B15
C20
D25
Answer & Solution
Correct answer: B. 15
یونین = 50 - 10 = 40۔ دونوں کی طرح = 30 + 25 - 40 = 15۔
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