A factory shipped 20,000 units last month from two production lines:
Every defective unit from the month is collected into one bin, and a single unit is drawn from that bin at random.
What is the probability that the drawn unit came from Line B?
Give your answer as a percentage rounded to 2 decimal places (for example, 12.34). Type the number only — do not include the % sign.
Once you get it right, the reasoning behind the answer shows up here.
Explore outcomes, set operations, double-counting in addition rules, and conditioning on subsets.
Select a condition above to shrink the sample space and observe conditioning.
Conditioning restricts reference group:
Click Condition on B. Faded items will represent values that no longer belong to the reference space.
| Color / Shape | Circle (A) | Square (A') | Total |
|---|---|---|---|
| Blue (B) | 6 | 2 | 8 |
| Orange (B') | 4 | 8 | 12 |
| Total | 10 | 10 | 20 |
Highlighted rows or columns show the new restricted sample space depending on selected condition. Joint cell intersection stays in focus.