Understanding the COVID-19 Affected Persons Data

The question asks us to analyze data related to persons affected by the 'COVID-19' pandemic across five different cities (A, B, C, D, E) in India. The provided table gives the total number of affected persons in thousands for each city and the ratio of affected males to females within those totals.

We need to calculate the total number of affected males in cities 'B', 'C', and 'E' combined and the total number of affected females in cities 'A', 'C', and 'D' combined. Finally, we must find the difference between these two totals.

Calculating Affected Males and Females per City

To find the number of males or females in a city, we use the total number of affected persons and the given male to female ratio. If the ratio is $M:F = m:f$, the total parts in the ratio are $m+f$.

• Number of Males = Total Affected $\times \frac{m}{m+f}$
• Number of Females = Total Affected $\times \frac{f}{m+f}$

Let's calculate the number of affected males and females for the required cities:

Affected Males in Cities B, C, and E

• City B: Total Affected = 54 Thousand, Ratio M:F = 5:4. Total parts = 5 + 4 = 9.

  Males in B = $54 \times \frac{5}{9} = 6 \times 5 = 30$ Thousand.

• City C: Total Affected = 16 Thousand, Ratio M:F = 3:1. Total parts = 3 + 1 = 4.

  Males in C = $16 \times \frac{3}{4} = 4 \times 3 = 12$ Thousand.

• City E: Total Affected = 27 Thousand, Ratio M:F = 2:1. Total parts = 2 + 1 = 3.

  Males in E = $27 \times \frac{2}{3} = 9 \times 2 = 18$ Thousand.

Total number of affected males in cities B, C, and E together = Males (B) + Males (C) + Males (E)

Total Males (B, C, E) = $30 + 12 + 18 = 60$ Thousand.

Affected Females in Cities A, C, and D

• City A: Total Affected = 64 Thousand, Ratio M:F = 5:3. Total parts = 5 + 3 = 8.

  Females in A = $64 \times \frac{3}{8} = 8 \times 3 = 24$ Thousand.

• City C: Total Affected = 16 Thousand, Ratio M:F = 3:1. Total parts = 3 + 1 = 4.

  Females in C = $16 \times \frac{1}{4} = 4 \times 1 = 4$ Thousand.

• City D: Total Affected = 48 Thousand, Ratio M:F = 7:5. Total parts = 7 + 5 = 12.

  Females in D = $48 \times \frac{5}{12} = 4 \times 5 = 20$ Thousand.

Total number of affected females in cities A, C, and D together = Females (A) + Females (C) + Females (D)

Total Females (A, C, D) = $24 + 4 + 20 = 48$ Thousand.

Finding the Difference

The question asks for the difference between the total number of males in cities B, C, E and the total number of females in cities A, C, D.

Difference = Total Males (B, C, E) - Total Females (A, C, D)

Difference = $60$ Thousand - $48$ Thousand = $12$ Thousand.

Since the numbers in the table are in thousands, the difference of 12 thousand is equal to 12,000 persons.

Revision Table: Summary of Calculations

Additional Information on Data Interpretation

Data interpretation questions often require careful reading of the provided information, which might be in tables, charts, or graphs. Key steps include:

• Understanding the units (e.g., 'in Thousands').
• Identifying the specific values needed for the calculation.
• Applying the correct mathematical operations (like ratios, percentages, sums, differences, averages) based on the question asked.
• Ensuring calculations are accurate.

In this problem, understanding how to split a total quantity according to a given ratio is crucial for finding the number of affected males and females in each city. The final step is a simple difference calculation based on the aggregated numbers from selected cities.