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Sahay Sir > Question Answers > NCERT Class 10 > Maths > Chapter 15 - Probability > A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Find x.

A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what it was before. Find x.

A box contains 12 balls out of which x are black. If one ball is drawn at random from the box the probability of drawing a black ball is now double of what it was before. Find x. what is the probability that it will be a black ball? If 6 more black balls are put in the box