A box contains 12 balls out of which x are black. If 6 more black balls are put in the box, the probability of drawing a black ball
A box contains 12 balls out of which x are black. If 6 more black balls are put in the box, the probability of drawing a black ball now is double of what it was before. The value of x is ………
A) 5
B) 4
C) 3
D) 2
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