Question

15 balls are in bag of red and blue balls if 6 is red how many red balls must be added to bag so that probability is 2÷3​

Answer 1

I think 12 is the correct answer

Answer 2

Answer: 12 red balls must be added

Explanation:

Starting out with 15 balls, 6 red implies 9 blue. If blue remains 9, then we expect red to be 18 for a probability at 2/3. 18-6 = 12