Make yourself a tree-diagram with two main branches C --- by car and A --- by airplane
Each of those will have 2 branches of O -- on time and L -- for late
Enter the probability along each of the branches, so
CO ---> (.6)(.3) = .18
CL ---> (.6)(.7) = .42
AO ---> (.4)(.65) = .26
AL ---> (.4)(.35) = .14
Note they add up to 1 , as expected
i) add CO + A)
ii) that would be AL
The probability that a Kaduna businessman goes to Lagos by car is 0.6, and by air is 0.4. If he goes by car, the probability that he will be on time for his appointment is 0.3 and if he goes by air it is 0.65
i)Find the probability that he arrives in Lagos early for an appointment
ii)One Monday, he arrived late for his appointment. Find the probability that he went by car?
2 answers
Yes