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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 the probability of drawing a blue ball is double that of a red ball, find the number of blue balls in the bag

    • Posted by Goutham A 6 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Poonam Hooda 6 years, 1 month ago

    Let some blue ball x Total balls=x+5 P (drawing red ball)=5/x+5 P (drawing a blue ball)=x/x+5 According to question, P (drawing blue ball)=2P (drawing a re d ball) X/x+5=2 (5/x+5) X/x+5=10/x+5 X=10 Blue balls =10

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