A) 4
B) 5
C) 6
D) 7
Correct Answer: C
Solution :
Clearly, the black cards are either clubs or spades while red cards are either diamonds or hearts. Let the number of spades be x. Then, number of clubs \[=(7-x)\] Number of diamonds \[=2\times \] number of spades \[=2x\] Number of hearts \[=2\times \] number of diamonds = 4x Total number of cards \[=x+2x+4x+7-x=6x+7\] \[\therefore \] \[6x+7=13\] \[\Rightarrow \] \[6x=\] \[\Rightarrow \] \[x=1\] Hence, number of clubs \[=(7-x)=6\]You need to login to perform this action.
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