A box contains 12 balls out of which x are black. If one ball is drawn at random from
the box, What is the probability that it will be a black ball ?
If 6 more balls are put in the box, the probability of drawing a black bell is now??
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Answer:
Step-by-step explanation:p(e)= 12/x and 12/x+6
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total balls=12
no. of black balls=x
probability = x/12
probability after 6 balls are added:
total balls=12+6=18
black balls=x
probability = x/18
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