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 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

1. A

   Rs. 171 and Rs. 148

2. B

   Rs. 120 and Rs. 180

3. C

   Rs. 150 and Rs. 130

4. D

   Rs. 151 and Rs. 128

Appeared in: DSSSB - 28 August 2019 (Shift-1)

Explanation

• The average is calculated by the formula: Average = (Sum of all values) / (Number of values).
• For Project C, the sum of revenues over 5 years is 180 + 160 + 190 + 125 + 200 = 855.
• The average revenue for Project C is 855 divided by 5, which equals 171.
• For Project D, the sum of revenues over 5 years is 130 + 120 + 160 + 180 + 150 = 740.
• The average revenue for Project D is 740 divided by 5, which equals 148.
• Thus, the average revenues are Rs. 171 (in 000s) and Rs. 148 (in 000s) for Projects C and D, respectively.

Why Other Options Were Wrong

• Option B: These values (120 and 180) represent the revenue for Project A in 2014-15 and 2016-17, respectively. They are individual data points, not the calculated averages for Projects C and D.
• Option C: These values (150 and 130) represent the revenue for Project B and Project D in the year 2014-15. They are individual data points from a single year, not the overall averages.
• Option D: These values (151 and 128) are the result of incorrect calculations. They do not represent the true average of the revenues for Projects C and D.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculating the average (mean) from a data table as background academic context rather than a clinical decision trigger.
• While this is a general mathematics question, the ability to calculate averages is a fundamental skill for nurses.
• Nurses use averages to monitor patient trends, such as average daily fluid intake/output, average blood glucose levels over a week, or average pain scores.
• Accurate calculation is crucial for making informed clinical decisions and evaluating the effectiveness of treatments.

How to Approach the Question

• First, carefully read the question to understand what needs to be calculated. Here, it is the average revenue for Project C and Project D.
• Identify the formula for calculating an average: Sum of values divided by the number of values.
• Locate the column for Project C in the table and list all the revenue values: 180, 160, 190, 125, 200.
• Calculate the sum of these values (855) and divide by the number of years (5) to get the average for Project C (171).
• Repeat the process for Project D: Sum the values (130, 120, 160, 180, 150) to get 740, and divide by 5 to get the average (148).
• Compare your calculated pair of averages (171, 148) with the given options to find the correct answer.

Concept Tested & Keywords

• Concept Tested: Calculating the average (mean) from a data table.
• Stem keywords: average revenue, Project C, Project D, table
• Lead-in keywords: What is

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