Question

1. A bag contains 12 balls out of which x are white. If 6 more white balls are put in the bag, the probability of getting a white ball becomes double. Find the value of x.

Answer 1

Answer:

12

Step-by-step explanation:

Initially, total number of ball = 12, and number of white ball = x.

so, probability of getting a white ball = x/12

After adding 6 more white balls, the total number of balls become = 12 + 6 = 18, and number of white balls = x + 6.

So, probability of white ball = (x + 6)/18.

So,   x/12 = (x + 6)/18

  =>  18x = 12x + 72

  =>  6x = 72

  =>   x = 12