DSSSB 12 August 2024
Non Nursing Subjects
Medium
90% of the population of a village is 25920. What is the total population of the village?
Appeared in: DSSSB 12 August 2024
Explanation
- The problem can be set up as an algebraic equation. Let 'P' be the total population.
- The equation is: 90% of P = 25920, which translates to 0.90 × P = 25920.
- To solve for P, isolate it by dividing the given number by the percentage (in decimal form): P = 25920 / 0.90.
- Performing the calculation gives the total population P = 28800.
Why Other Options Were Wrong
- Option A: This value is too high. Calculating 90% of 37056 results in 33350.4, which does not match the given population figure of 25920.
- Option B: This value is incorrect. 90% of 30440 is 27396, not 25920. This error might arise from a slight miscalculation.
- Option D: This value is incorrect. 90% of 29736 is 26762.4, not 25920. This is another potential result of a calculation error.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Percentage and Basic Algebra as background academic context rather than a clinical decision trigger.
- While a general aptitude question, proficiency in percentage calculations is vital in nursing for tasks like medication dosage calculations, determining IV fluid rates, and interpreting patient data (e.g., percentage of weight loss).
- What if? If the question stated that 25920 was the remaining 10% of the population after an event, the total original population would be calculated as 25920 × 10 = 259,200, highlighting how the framing of the percentage is critical.
How to Approach the Question
- Step 1: Identify the knowns and the unknown. You know that a part of the population (25920) corresponds to a specific percentage (90%). The unknown is the total population.
- Step 2: Convert the percentage to a decimal or fraction for calculation. 90% is equal to 0.90 or 90/100.
- Step 3: Set up an algebraic equation. Let 'P' represent the total population. The equation is 0.90 * P = 25920.
- Step 4: Solve for the unknown variable 'P' by isolating it. Divide the known part by the percentage: P = 25920 / 0.90.
- Step 5: Perform the calculation to find the final answer and compare it with the given options.
Concept Tested & Keywords
- Concept Tested: Percentage and Basic Algebra
- Stem keywords: population, village, 90%
- Lead-in keywords: What is
Question ID
QaFnz7ceBh0llDH5Rm8w08
Practise the full DSSSB 12 August 2024
Attempt every question from this paper in a timed mock, then review the full solution for each one.
More Mathematics Questions
- 15 years hence a man will be just 4 times as old as he was 15 years ago. His present age is -?
- The ratio of number of girls to boys in a school of 2520 students is 27:29. How many more girls should be admitted to make the ratio 1:1?
- Three candidates contested an election and received 4500, 7500 and 8000 votes respectively. What percentage of votes did the winning candidates get?
- A man rows downstream at 15 km/hr and against the stream at 9 km/hr. His speed in still water is:
- Two bells ring at intervals of 59 seconds and 70 seconds. If they both ring at 10 O'clock in the morning together, after how many seconds will they r…
- The average of four numbers is 61. The largest number among them is 85 and the smallest number is 21. What will be the larger of the remaining two nu…
- In what ratio should water be mixed with milk so that on selling the mixture at cost price a profit of 20% is made?
- A quality control analyst rejects 0.08% of the fabric produced, finding it defective. How many meters of fabric must he examine to reject 4 meters?
- A man traveled from his village to the post office at a speed of 25km/hr and returned at a speed of 4km/hr. If the entire journey took 5 hours and 48…
- A train is running at 60 km/hr. How much time will it require to cross a 2 km bridge?
More DSSSB 12 August 2024 Questions
- What is the meaning of conation?
- All of the following are selective serotonin inhibitors, EXCEPT:
- Which of the following is NOT a parameter of the Braden scale?
- Which of the following is a way of dealing with or remembering information by separating it into small groups?
- A common measure of the severity of a disease, based on current physiological parameters, age and previous health conditions, is the
- The formation of sequestrum and involucrum is seen in the pathogenesis of:
- An adult patient was diagnosed with paranoid schizophrenia, and the doctor prescribed him chlorpromazine. After three weeks, the patient developed a…
- World Anti-Tobacco Day is observed on:
- Which of the following pubertal changes is characterised by breast budding in females?
- What is the inability to recognize familiar inanimate objects called?