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_(1), B_(2), B_(n) sets each with 3 elements, let underset(i=1)overset(30)(uu) A_(i) = underset(j=1)overset(n)(uu) B_(j) =S and each element of S belongs to exactly 10 of the A_(i)'s and exactly 9 of the B_(j)'s . Then, n is equal to

Suppose A_(1),A_(2),…,A_(30) are 30 sets each with 5 elements and B_(1),B_(2),…,B_(n) are n sets each with 3 elements. Let underset(i=1)overset(30)uu A_(i)=underset(j=1)overset(n)uu B_(j) Assume that each element of S belongs to exactly ten A_(i) ' s and to exactly nine of the B_(j) 's then n =

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 :

Suppose A_1 , A_2 ..... A_30 are thirty sets each with five elements and B_1,B_2....B_n are n sets each with three elements such that cap_(i=1)^30 A_i = cap_(j=1)^n B_j = S . If each elements of S belongs to exactly ten of the A_i s and exactly nine of the B_j's then the value of n is

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