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A bag contains 3 red balls and 4 green balls. If one ball is drawn at random, what is the probability that it is red?
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The probability that the ball drawn is red would be $\dfrac{3}{7}$. This is because there are 3 red balls out of a total of 3+4=7 balls in the bag, so the probability of drawing a red ball is $\dfrac{3}{7}$.
by Diamond (88,926 points)

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