Question

There are 500 red and blue balls in a ball pit. 30% of the balls are red.

When some of the blue balls were taken out, 40% of the remaining balls
were red. How many balls were taken out?

Answer 1

50 I think

Explanation:

30% of 500 is 150 so we have 150 red balls

40% of 500 is 200 so we can assume 50 balls were taken out