Multiply 3005 by 0.817 to get your answer. Doing this gives you 81.7% of the total people surveyed which happens to be the amount of people who 'use at least one prescription medication' as outlined by the problem.
So you have to figure out 81.7% of 3005. 3005 ÷ 2 = 1502.5 = 50% 3005 ÷ 5 = 601 = 20% 3005 ÷ 10 = 300.5 = 10% 3005 ÷ 100 = 30.05 = 1% 3005 ÷ 1000 = 3.005 = 0.1% Then you just add 1502.5 + (601 + 300.5) + 30.05 + (3.005 x 7) 1502.5 + 901.5 + 30.05 + 21.035 = 2455.085 (the answer) The answer above is if you have a calculator/if it's a calculator question