- *Ending Scenario:* - Red Balls (RB): 0 (all have been drawn) - Blue Balls (BB): 50 (none have been drawn) - White Balls (WB): 0 (since no blue balls were drawn, no white balls were added) - Total Balls: 50

It should give you pause that you had to pick not only the line by which to judge the answer but the part of the line. The sentence immediately before that is objectively wrong:

> This is one possible scenario.

It says the number of blue balls drawn is x and the number of red balls drawn is y, and then asserts x + y = 100, which is wrong.

Then it proceeds to "solve" an equation which reduces to x = x to conclude x = 0.

It then uses that to "prove" that y = 100, which is a problem as there are only 50 red balls in the container and nothing causes any more to be added.

It's like "mistakes bad students make in Algebra 1".