43rd B.P.S.C. (Pre) 1999

$x =\{a, b\}$, $y = \{2, 3\}$ and $z = \{3, 4\}$, then choose $x \times (y \cap z)$

a$\{(a, 3), (b, 3)\}$✓ Correct
b$\{(3, a), (3, b)\}$
c$\{(a, 2), (a, 4), (b, 2) (b, 4)\}$
d$\{a, b, 2, 3, 4\}$

Explanation

Given that $x = \{a,b\}$, $y = \{(2, 3)\}$ }$ & $z = \{3, 4\}$ $y \cap z = \{3\}$ $x \times (y \cap z) = (a, b) \times \{3\}$ $x \times (y \cap z) = (a, 3), (b, 3)$

general-mental-ability