15 years out of school and with a non-science degree under my belt, my maths is a bit rusty. Need to brush up for a computer-based test. The question is this: "Some tourists return to the same country several times in the same year. In 2000, it was noted that in Italy 80% of tourists made a single trip to the country, 15% came twice, and 5% at least 3 times. How many individual tourists visited Italy in 2000?" Then there is a table: "Tourists staying at least 1 night when visiting a country (in thousands)" and under Italy the figure for the year 2000 is 22,800. The answer is multiple-choice: Up to 20,330,000 Up to 21,500,000 Up to 21,670,000 Up to 22,800,000 Up to 20,220,000 I can click on Show result to know the right answer, but don't know how to get there... Ideas?