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What is a Sex Ratio?
Grade Level:
Class 7
Law, Civic Literacy, Economics, FinTech, Geopolitics, Personal Finance, Indian Governance
Definition
What is it?
The Sex Ratio is the number of females per 1000 males in a given population. It helps us understand the balance between the number of boys and girls or men and women in a particular area, like a village, city, or country.
Simple Example
Quick Example
Imagine your school has 1000 boys. If there are 950 girls studying in the same school, then the sex ratio of your school would be 950. It tells us that for every 1000 boys, there are 950 girls.
Worked Example
Step-by-Step
Let's find the sex ratio of a small town.
Step 1: Count the total number of males in the town. Suppose there are 5000 males.
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Step 2: Count the total number of females in the town. Suppose there are 4800 females.
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Step 3: Use the formula: Sex Ratio = (Number of Females / Number of Males) * 1000.
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Step 4: Substitute the values: Sex Ratio = (4800 / 5000) * 1000.
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Step 5: Calculate the division: 4800 / 5000 = 0.96.
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Step 6: Multiply by 1000: 0.96 * 1000 = 960.
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Answer: The sex ratio of the town is 960.
Why It Matters
Understanding sex ratio is crucial for government planning, especially in Law and Civic Literacy, to ensure equal opportunities and address social issues. Demographers and social scientists use this data to study population trends and advise on policies, helping to build a fair society for everyone.
Common Mistakes
MISTAKE: Calculating it as males per 1000 females | CORRECTION: Sex Ratio is always defined as the number of females per 1000 males.
MISTAKE: Forgetting to multiply by 1000 at the end | CORRECTION: The ratio is expressed 'per 1000 males', so the final calculation must involve multiplying the decimal by 1000.
MISTAKE: Confusing sex ratio with child sex ratio | CORRECTION: Sex ratio generally refers to the entire population, while child sex ratio specifically looks at children in the 0-6 age group.
Practice Questions
Try It Yourself
QUESTION: In a village, there are 2500 males and 2400 females. What is the sex ratio of the village? | ANSWER: 960
QUESTION: A district has a population of 1,20,000 males and 1,14,000 females. Calculate its sex ratio. | ANSWER: 950
QUESTION: If a city has a sex ratio of 930 and there are 5,00,000 males, how many females are there in the city? | ANSWER: 4,65,000 females
MCQ
Quick Quiz
What does a sex ratio of 900 mean?
There are 900 males for every 1000 females.
There are 900 females for every 1000 males.
There are 900 boys and 1000 girls.
There are 900 people in total.
The Correct Answer Is:
B
The sex ratio is defined as the number of females per 1000 males. So, a ratio of 900 means there are 900 females for every 1000 males.
Real World Connection
In the Real World
The Indian government conducts a Census every 10 years, collecting data on population, including sex ratio. This data is used by departments like the Ministry of Women and Child Development to design programs and policies, such as 'Beti Bachao, Beti Padhao', to improve the status of girls and women across the country.
Key Vocabulary
Key Terms
POPULATION: The total number of people living in a specific area | CENSUS: An official count or survey of a population, typically recording details of individuals | DEMOGRAPHY: The study of statistics such as births, deaths, income, or disease, which illustrate the changing structure of human populations | RATIO: A comparison of two numbers by division
What's Next
What to Learn Next
Now that you understand sex ratio, you can learn about 'Child Sex Ratio' and 'Literacy Rate'. These concepts are also important for understanding the well-being and development of our society.
