Stage 9 - Q4 - 3 marks
19930
Use the independent-event tree to find \(P(\text{both events or neither event})\).
\(\frac{1}{3}\)
\(\frac{2}{3}\)
A
not A
\(\frac{1}{3}\)
\(\frac{2}{3}\)
\(\frac{1}{3}\)
\(\frac{2}{3}\)
A, B
A, not B
not A, B
neither
Hint
Multiply along a path; add only the separate paths you need.