If set A has 10 elements and set B has 4 elements, number of elements in set A $\times$ B is _____.

2.5

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Solution

The correct option is C
40

Number of elements in set A = n(A) =10

Number of elements in set B = n(B) = 4

Number of elements in set (A $\times$ B) = n(A $\times$ B)

n(A $\times$ B) = Number of elements in set A × Number of elements in set B

= 10 $\times$ 4

= 40

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