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A bag contain 3 red, 4 black and 2 green balls. Two balls are drawn from the bag. Find the probability that botb are of different colour?

    • Posted by Mehak Thakur 6 years, 4 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Sia ? 6 years, 4 months ago

    P (RR)+P (BB)+P (GG)={tex}\frac{3 \times 2 + 4 \times 3 + 2 \times 1}{9 \times 8}{/tex} = {tex}\frac{20}{72} = \frac{5}{18}{/tex}
    Since this is the probability of a match, the probability that we do not match colors is {tex}1 - \frac{5}{18} = \frac{13}{18}{/tex}

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