(d) A - (B - C) = (A - B) U (A intersect C) (e) (A - B) - C = A - (BU C) of class 9 adv. maths
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(d) A - (B - C) = (A - B) U (A intersect C) (e) (A - B) - C = A - (BU C) of class 9 adv. maths
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