প্রশ্নঃ A = {1, 3, 5}, B ={2, 4, 6} হলে B - A = কত?
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ক.∅
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খ.{1, 4}
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গ.{2, 4, 6}
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ঘ.{1, 3, 5}
উত্তরঃ গ
 ∅ খ) {1, 4} গ) {2, 4, 6} ঘ) {1, 3, 5} উত্তর: গ) {2, 4, 6}
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