Mathematics
Senior High
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D
18 集合 A, Bは全体集合びの部分集合で, n(U)=100, n(AUB)=70,
n(ANB)=15, n(ANB)=40 である。次の集合の要素の個数を求めよ。
(2) B
(3) AnB
(4) ANB
(5) AUB
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