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[cose A(1),A(2),...,A(30)" are thirty se...

[cose A_(1),A_(2),...,A_(30)" are thirty sets each having "5" elements with no comm "],[" ts and "B_(10)B_(2),...,B_(n)" are "n" sets each having "3" elements with no comm "],[" ts.Let "hat y_(i-1)A_(i)=uuu_(j=1)^(N)B_(j)=S," and each element of "S" belongs to exal "],[" lig of "P^(2)" .The you value fo "B" ,and each element of "S" belongs to exa "],[" la "9" of "P^(2)" .The you value fo "B" ,and each element of "S" belongs to exa "]

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Suppose A_(1),A_(2),……,A_(20) are twenty sets each having 5 elemennts and B_(1),B_(2),………..,B_(n) are n sets each having 2 elements. Let U_(i=1)^(20)A_(i)=S=U_(f=1)^(n)B_(f) . If each element of S belong to exactly 10 of the A_(i)^(')s and to exactly 4 of the B_(i)^(')s then n is (i) 10 (ii) 20 (iii) 100 (iv) 50

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Suppose A_1,A_2….. A_(30) are thirty sets each having 5 elements and B_1B_2…..B_n are n sets each having 3 elements ,Let overset(30)underset(i=1)bigcupA_1=overset(n)underset(j=1)bigcupB_j=s and each element of S belongs to exactly 10 of the A_1 and exactly 9 of the value of n.

Suppose A_1,A_2….. A_(30) are thirty sets each having 5 elements and B_1B_2…..B_n are n sets each having 3 elements ,Let overset(30)underset(i=1)bigcupA_1=overset(n)underset(j=1)bigcupB_j=s and each element of S belongs to exactly 10 of the A_1 and exactly 9 of the value of n.

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Suppose A_1,A_2 …., A_30 are thirty sets, each having 5 elements and B_1,B_2 ,….., B_n are n sets , each with 3 elements, let uu_(i=1)^(30)A_i = uu_(j=1)^(n)B_j=S and each element of S belongs to exactly 10 of A'_i and exactly 9 of B'_j . Then n is equal to :