A bag contains 12 balls of which x are white. If 6 more white balls are added, the probability of drawing a white ball becomes double what it was before. Find x.

Question

Accepted Answer

3. Before: x/12. After adding 6 white: x+6/18. Given x+6/18 = 2 · x/12 = x/6. So (x+6) = 3x, 6 = 2x, x = 3.

A bag contains 12 balls of which $x$ are white.
If 6 more white balls are added, the probability of drawing a white ball becomes double what it was before.
Find $x$ .

Step-by-Step Solution

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More Class 10 Probability of Simple Events practice

A bag contains 12 balls of which x are white.If 6 more white balls are added, the probability of drawing a white ball becomes double what it was before.Find x.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Probability of Simple Events practice

A bag contains 12 balls of which $x$ are white.
If 6 more white balls are added, the probability of drawing a white ball becomes double what it was before.
Find $x$ .