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A box contain 12 which some …

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A box contain 12 which some are red in colour if 6 more red ball are put in the box and a ball us drawn at random , the probability of drawing a red ball doubles then what is was before . Find the no. Of red ball

    • Posted by Rohit Singh 6 years, 9 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Simmiii ?? 6 years, 9 months ago

    Let no. Of red balls =x Total balls =12 Probability=x/12 If 6 more red balls are put in a box then Total balls 12+6=18 No. Of red balls=x+6 Probabily =x+6/18 X+6/18=2*x/12 By cross multiply x=3ans

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