Gce Model Questions Vol1 2017 Commerce Question 32

An advertising campaign can use three media: newspaper ads, online banner ads, and billboards. The cost and initial reach of one unit of each medium are: - Newspaper: cost ₦100,000, initial reach 500 000 people. - Online banner: cost ₦40,000, initial reach 200 000 people. - Billboard: cost ₦150,000, initial reach 800 000 people. For each medium, each additional unit reaches 5 % less than the preceding unit (i.e., the reaches form a geometric sequence with ratio 0.95). The company can purchase at most 10 units of any medium and has a total budget of ₦1,200,000. It must achieve a total reach of at least 4 million people. Determine the numbers of newspaper ads, online banner ads, and billboards that meet the reach target at the minimum possible total cost. Provide the three quantities and the total cost.