a) Amal and Aruyan are best friends. Aruyan's decision depends on Amal's. When Amal
goes on a road trip, Aruyan goes with him 80% of the time. When Amal does not go
on a road trip, Aruyan goes on a road trip 22% of the time. Amal's probability of going
on a road trip this weekend is 18%.
i)
What is the probability that both don't go on a road trip this weekend?
ii)
What is the probability that only one of them goes on a road trip?
b) The odds in favour of Aisha passing Math 6:1 and the odds in favor of Bansi passing
Math is 9:2. What is the probability that only one of them will pass Math? Assume
independent events.