DSSSB - 29 August 2019 (Shift-1)
Non Nursing Subjects
Medium
The following table shows the revenue generated by different projects (in 000s) over different years. What is the average revenue earned (in 000s) from Project C and Project D?
| Years | A | B | C | D |
|---|---|---|---|---|
| 2014-15 | 120 | 150 | 180 | 130 |
| 2015-16 | 150 | 200 | 160 | 120 |
| 2016-17 | 180 | 210 | 190 | 160 |
| 2017-18 | 200 | 250 | 125 | 180 |
| 2018-19 | 175 | 225 | 200 | 150 |
Appeared in: DSSSB - 29 August 2019 (Shift-1)
Explanation
- The average is calculated by summing all the values in a set and dividing by the count of those values.
- For Project C, the sum of revenues is 180 + 160 + 190 + 125 + 200 = 855. Dividing by 5 years gives an average of 171.
- For Project D, the sum of revenues is 130 + 120 + 160 + 180 + 150 = 740. Dividing by 5 years gives an average of 148.
- The calculated averages (171 and 148) directly match the values presented in this option.
Why Other Options Were Wrong
- Option B: These values (120 and 180) represent single-year revenues for different projects and are not the calculated averages over the five-year period.
- Option C: These values (150 and 130) are the revenues for Project B and Project D in the year 2014-15, not the averages for C and D.
- Option D: These values (151 and 128) are the result of incorrect calculations and do not represent the true averages.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of average (mean) from a data table as background academic context rather than a clinical decision trigger.
- While this is a mathematics question, the concept of 'average' is fundamental in healthcare and nursing practice for interpreting data.
- Nurses calculate averages to monitor patient trends, such as average daily fluid intake/output, average blood glucose levels over a week, or average pain scores post-intervention.
- In hospital administration and nursing research, averages are used to analyze data like average length of stay, average cost of care, or average patient satisfaction scores.
How to Approach the Question
- First, carefully read the question to understand what is being asked. Here, the goal is to find the 'average revenue' for two specific projects, C and D.
- Next, locate the data for Project C in the table. These are the values in the column labeled 'C'.
- Recall the formula for average (mean): Sum of values divided by the number of values.
- Sum all the revenue values for Project C and divide by the number of years (5) to find its average.
- Repeat the process for Project D: sum its revenues and divide by 5.
- Finally, compare your calculated pair of averages with the given options to find the correct match.
Concept Tested & Keywords
- Concept Tested: Calculation of average (mean) from a data table.
- Stem keywords: average revenue, Project C, Project D, table
- Lead-in keywords: What is
Question ID
QWkye9GkbAEhmLBwLwPJ4i
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