Rather than needing to know the probable weight of 26 sheep and 10 goats is 7700kgs, you need to know by what margin of error it's probably over 5000kg. And you

Rather than needing to know the probable weight of 26 sheep and 10 goats is 7700kgs, you need to know by what margin of error it's probably over 5000kg. And you not only need to know the minimum age of 28 yrs, but also the probable age distribution of people with commercial boat licences, in both China and other countries. Along with knowing risk factors such as piracy rates in areas of the world where live sheep and goats are transported, you can combine all this info into a statistical model useful for actuarial purposes. Perhaps the exam question was searching for primary school kids to fast-track for a career in China's growing Insurance industry.