Table I shows the disease-wise percentage distribution of patients in the world. Table II shows the continent-wise percentage distribution of all patients and of kidney patients. The total world population in 2023 is 800 crore and 10 percent of them are patients.
| Disease | Percentage |
|---|---|
| Heart Disease | 22 |
| AIDS | 10 |
| TB | 8 |
| Hepatitis | 6 |
| Kidney Disease | 30 |
| Others | 24 |
| Continent | All Patients (%) | Kidney Patients (%) |
|---|---|---|
| Europe | 10 | 10 |
| Australia | 6 | 5 |
| South America | 15 | 40 |
| Africa | 25 | 10 |
| North America | 12 | 15 |
| Asia | 32 | 20 |
What is the ratio of the number of patients in Africa to the total number of kidney patients in Asia and North America together?
A3 : 1
B2 : 1
C49 : 22
D50 : 21 ✓ Correct
Correct answer: (D) 50 : 21
Explanation
The ratio is 50 to 21, so that is the answer.
There are 80 crore patients, and Africa has 25 percent, which is 20 crore.
Kidney patients in the world are 24 crore.
Asia has 20 percent of them, which is 4.8 crore.
North America has 15 percent, which is 3.6 crore, giving 8.4 crore together.
The ratio of 20 crore to 8.4 crore simplifies to 50 to 21.
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