Question

B = {5, 6, 7, 8}
C= {7,8, 19 20}.find B-C​

Answer 1

Answer:

5,6,9,10

Step-by-step explanation:

elements in b must not be in c

Answer 2

$\huge{\color{aqua}{\underbrace {\overbrace{\underline{\color{red}{\mathbb{Answer:}}}}}}}$

To find:-

B-C = B-(B ∩ C)

(B ∩ C)= B={5,6,7,8} ∩ C={7,8,19,20}

(B ∩ C)={7,8}

B-C={5,6,7,8} - {7,8}

B-C={5,6}

$\large{\color{aqua}{\underbrace {\underline{\color{red}{\mathbb{❥Hope\: it \:helps \:you....}}}}}}$