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A bag contains 5 red balls …

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A bag contains 5 red balls and some blue balls. If probability of drawing a blue ball is double that of red ball. Determine the number of blue balls?

Posted by Royal Boy Alok 7 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Kichcha Ragu 7 years, 3 months ago

Number of red balls = 5 Number of blue balls = x Total number of balls = 5+x Probability of red balls=5/5+x Probability of blue balls =x/5+x Given that, Pb of blue ball =2×Pb of red ball x/5+x=10/5+x (x/5+x)5+x=10 x=10 Raju

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CBSE > Class 10 > Mathematics