English
Gujarati
2.Relations and Functions
easy

यदि $A = \{ 2,\,4,\,5\} ,\,\,B = \{ 7,\,\,8,\,9\} ,$ तब $n(A \times B)$ बराबर है

A

$6$

B

$9$

C

$3$

D

$0$

Solution

$A × B = \{(2, 7), (2, 8), (2, 9), (4, 7), (4, 8), (4, 9), (5, 7), (5, 8), (5, 9)\}$

$n(A × B) = n(A) . n(B) = 3 × 3 = 9.$

Standard 11
Mathematics

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