Home › CBSE Class 11 (Commerce) › Mathematics › Sets, Relations and Functions › The cardinality of A × B equals what?
The cardinality of A × B equals what?
AThe sum of the sizes of A and B
BThe product of the sizes of A and B
CThe larger of the two sizes
DThe difference of the two sizes
Answer & Solution
Correct answer: B. The product of the sizes of A and B
Each element of A pairs with every element of B, so the sizes multiply.
Related questions
What is the domain of f(x) = 1/(x - 2) among real numbers?Is the code (DL, 01) the same as the code (01, DL)?Three states each pair with 3 licence codes as (state, code). How many pairs result?If n(A × B) = 15 and n(A) = 3, what is n(B)?If A = {1, 2} and B = {3, 4}, which pair is NOT in A × B?On A = {1, 2, 3}, how many pairs does R = {(x, y) : x < y} contain?If A is infinite and B is non-empty, what can be said of A × B?A binary relation equals its converse exactly when it has which property?