Answer the following questions based on the information given below.
Over the top (OTT) subscribers of a platform are segregated into three categories: i) Kid, ii) Elder, and iii) Others. Some of the subscribers used one app and the others used multiple apps to access the platform. The figure below shows the percentage of the total number of subscribers in 2023 and 2024 who belong to the ‘Kid’ and ‘Elder’ categories
The following additional facts are known about the numbers of subscribers.
1. The total number of subscribers increased by 10% from 2023 to 2024.
2. In 2024, 1/2 of the subscribers from the ‘Kid’ category and 2/3 of the subscribers from the ‘Elder’ category subscribers use one app.
3. In 2023, the number of subscribers from the ‘Kid’ category who used multiple apps was the same as the number of subscribers from the ‘Elder’ category who used one app.
4. 10,000 subscribers from the ‘Kid’ category used one app and 15,000 subscribers from the ‘Elder’ category used multiple apps in 2023.
Q4
DI - Charts & Tables MULTIPLE CHOICE
What could be the minimum percentage of subscribers who used multiple apps in 2024?
Answer: A
From the chart: in 2023, Kid = 15% and Elder = 20% of all subscribers. In 2024, Kid = 20% and Elder = 30%.
2023: let T be the total and k the common number in fact 3 (Kid using multiple apps = Elder using one app).
Kid = 10,000 + k = 0.15T
Elder = k + 15,000 = 0.20T
Subtracting the first from the second: 5,000 = 0.05T, so T = 1,00,000.
Kid = 15,000, so k = 5,000. Elder = 20,000.
2024: the total is 1,10,000.
Kid = 22,000: 11,000 use one app and 11,000 use multiple apps.
Elder = 33,000: 22,000 use one app and 11,000 use multiple apps.
Others = 1,10,000 − 22,000 − 33,000 = 55,000. How they split between one and multiple apps is not known.
In 2024, 11,000 Kids and 11,000 Elders use multiple apps: 22,000 in all. The Others could all be single-app users, which gives the minimum.
