A) \[^{8}{{C}_{5}}{{\times }^{10}}{{C}_{4}}\]
B) \[^{10}{{C}_{5}}{{\times }^{8}}{{C}_{4}}\]
C) \[^{18}{{C}_{9}}\]
D) None of these
Correct Answer: B
Solution :
Required number\[{{=}^{10}}{{C}_{5}}{{\times }^{8}}{{C}_{4}}\].
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