squares and F, be the set of trapeziums in a plane.NCERT ExemplarlThen, F may be equal toF2UF FOF15. Suppose A, A2,..., Ago are thirty sets each having3 elements and B, B2, , Bn are n sets each having8 elements. Let A,- B,S and each30j-1elements of S belongs to exactly 10 of A,'s and exactly9 of B,'s. The value of n is equal to INCERT Exemplarl16.IfA={x : x is a multiple of 4}andB=(x:x is a

squares and F, be the set of trapeziums in a plane.NCERT ExemplarlThen

1.	squares and F, be the set of trapeziums in a plane.NCERT ExemplarlThen, F may be equal toF2UF FOF15. Suppose A, A2,..., Ago are thirty sets each having3 elements and B, B2, , Bn are n sets each having8 elements. Let A,- B,S and each30j-1elements of S belongs to exactly 10 of A,'s and exactly9 of B,'s. The value of n is equal to INCERT Exemplarl16.IfA={x : x is a multiple of 4}andB=(x:x is a
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