Question

if A={2,3,5}andB={5,7},find B×A​

Answer 1

Cartesian product of sets :-If P and Q are two non empty sets , then cartesian product of all ordered pair of elements from P to Q i.e. P×Q={(p,q):p E P,q E Q}

Given A={2,3,5}&B={5,7}

B×A ={5,7}×{2,3,5}={(5,2),(5,3),(5,5),(7,2),(7,3),(7,5)}