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Solution


Q.

Find the number of ways of choosing two red cards and two black cards from a pack of 52 playing cards.
1 105620  
2 105624  
3 105625  
4 105600  

Ans.

(3)

There are 26 red cards and 26 black cards. Therefore, the required number of ways =C226×C226

=(26!2! 24!)2=(325)2=105625