Question

) A = { a,b,p } B = { 2,3 } C = { p,q,r,s } then n[ ( AUB ) × B ] is ______​

Answer 1

Answer:

n[(AUB)×B]

AUB={a,b,p,2,3}

B={2,3}

then [(AUB)×B]={(a,2),(a,3),(b,2),(b,3),(p,2),(p,3),(2,2),(2,3),(3,2),(3,3)}

number of elements = 5×2 = 10