Question

3. If A = (1,2,3). B=3.4,5) Then find n(AXB).
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Answer 1

Answer:

Given,

A = {1,2,3} B = {3.4,5}

n(A) = 3,

n(B) = 3

Therefore, n(A × B) = 3 × 3 = 9

Verification

A × B has ordered pair (x, y) where x ∈ A

and y ∈ B

A × B = { (1,3),(1,4),(1,5)

(2,3),(2,4),(2,5)

(3,3),(3,4),(3,5) }

Here n(A × B) = 9.

Hence verified