7. If n(A - B) = 14, n(A U B) = 29 and n(A n B) = 9, then n(B - A) is
(a) 5
(c) 7
(d) 10
(b) 6
no spam please
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7. If n(A - B) = 14, n(A U B) = 29 and n(A n B) = 9, then n(B - A) is
(a) 5
(c) 7
(d) 10
(b) 6
no spam please
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