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प्रश्न
An urn 6 blue and x green balls. If the probability of drawing a green ball is double that of drawing a blue ball, then x = ______.
रिकाम्या जागा भरा
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उत्तर
An urn 6 blue and x green balls. If the probability of drawing a green ball is double that of drawing a blue ball, then x = 12.
Explanation:
Equate the probabilities: \[\frac{x}{6+x}=2\times\frac{6}{6+x}\]
Hence, x = 12.
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