Problem 77 of 7
Use a two-way table to compute union probability from total population 500, characteristic C 280, characteristic D 150, C and D 70.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
identify event totals and overlap cell.
Hidden until you reveal it.
Use row or column event totals and subtract the overlap cell once.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Find the row total for one event and column total for the other.
2. Find the overlap cell.
3. Apply P(A or B)=P(A)+P(B)-P(A and B).
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using only the overlap cell for an or question.