A bag contains 20% red balls, 30% green balls and the rest blue balls. If there are 80 blue balls, what is the total number of balls?
Show answer & explanation
Correct answer: B
Explanation
Red = 20%, Green = 30% ⇒ Total = 50%
Therefore, Blue balls = 50%
Given: 50% = 80 balls
Total balls = 80 × 100 / 50 = 160