The sum of 6 numbers is 396. Find their average.

Appeared in: DSSSB 12 August 2024

Explanation

The average, or arithmetic mean, is a central value of a finite set of numbers.
It is calculated by dividing the sum of all values by the total number of values.
In this case, the sum is 396 and the number of values is 6.
Calculation: 396 ÷ 6 = 66. Thus, the average is 66.

Option A: This is an incorrect calculation. If the average were 57, the sum of the 6 numbers would be 57 × 6 = 342, not 396.
Option B: This is an incorrect calculation. If the average were 64, the sum of the 6 numbers would be 64 × 6 = 384, not 396.
Option C: This is an incorrect calculation. If the average were 65, the sum of the 6 numbers would be 65 × 6 = 390, not 396.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Arithmetic Mean (Average) as background academic context rather than a clinical decision trigger.
While this is a basic math question, calculating averages is a fundamental skill in nursing.
Nurses use averages to determine mean arterial pressure (MAP), calculate average fluid intake and output over a shift, and monitor trends in vital signs.
Understanding averages is also crucial for interpreting statistical data in evidence-based practice and nursing research.

How to Approach the Question

First, identify the key information provided in the question: the sum of the numbers (396) and the total count of numbers (6).
Recall the formula for calculating the average (arithmetic mean): Average = Sum ÷ Count.
Substitute the given values into the formula: Average = 396 ÷ 6.
Perform the division to find the result.
Compare your calculated result with the given options to select the correct answer.

Concept Tested & Keywords

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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.