Foundation June 2022 Paper 2 Q20

EdexcelCurrent spec4 marksTree Diagrams

20 Lorena gets a train at the same time each morning to go to work.
She gets a train at the same time each evening to come home.

The probability tree diagram shows the probabilities of each train arriving late.

(a) Complete the probability tree diagram.
Probability tree diagram. Train to work: late 0.13, not late blank. Train home after late: late 0.06, not late blank. Train home after not late: late 0.06, not late blank
(2)

For a day that Lorena goes to work,

(b) work out the probability that the train to work and the train home will both arrive late. (2)