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Suppose A1,A2,...,A30 are thirty sets each having 5 elements and B1,B2,...,Bn are n sets each having 3 elements. Let each element of S belongs to exactly 10 of A′i s and exactly 9 of B′i s. Then, find the value of n. |
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Answer» Suppose A1,A2,...,A30 are thirty sets each having 5 elements and B1,B2,...,Bn are n sets each having 3 elements. Let each element of S belongs to exactly 10 of A′i s and exactly 9 of B′i s. Then, find the value of n. |
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