Probability

Probability

Secondary 4

A student takes a bus to school.

- The probability that the bus is late is \(\frac14\).
- If the bus is late, the probability that the student reaches school on time is \(\frac25\).
- If the bus is not late, the probability that the student reaches school on time is \(\frac9{10}\)

  1. Complete this tree.

Find the probability that:

  1. the bus is late but the student reaches school on time;

  2. the student reaches school on time;

  3. the student reaches school late.

Similar questions are unavailable for this question.
Answer:(a) \(\frac35,\frac34,\frac1{10}\); (b) \(\frac1{10}\); (c) \(\frac{31}{40}\); (d) \(\frac9{40}\)

Need help? Join our JC Math tuition classes.

Learn more