A bag contains 12 balls out of which x are black balls. Find the probability of getting a black ball if one ball is drawn at random. If 6 balls are added in the bag the probability of getting a black ball will be double.Find X.
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Answer:
Here, we are asked to find the probability of drawing a black ball from the bag containing 12 balls in which x balls are black. Therefore, the probability that the randomly drawn ball is black will be x12.
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Step-by-step explanation:
p(x)=x/12
six ball is added out of six let y ball be black
p(x+y)=x+y/18
probability double
2x/12=x+y/18
x/6=x+y/18
3x=x+y
2x=y
maximum value of y =6
x=1 or x=2 or x=3
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