Question

A = {1, 3, 5, 7, 9}
B = {2, 4, 6, 8, 10}
C = {1, 5, 6, 7, 9}
A∩(BC) =?

Answer 1

U between B and C

Answer 2

\[B\cup C = \left\{ 1,2,4,5,6,7,8,9,10 \right\}\]

Answer 3

the only number in A not in BorC is 3
thus {1,5,7,9}

Answer 4

Then :
\[A\cap (B\cup C) = \left\{ 1,5,7,9 \right\}\]