0

0

You have a list of sales amounts: var sales = new List<double> { 100.5, 200.75, 150.25, 300.0 }; How do you calculate the average sale amount correctly?

hard🚀 Application Q8 of 15

C Sharp (C#) - LINQ Fundamentals

You have a list of sales amounts: var sales = new List<double> { 100.5, 200.75, 150.25, 300.0 }; How do you calculate the average sale amount correctly?

Avar average = sales.Sum / sales.Count();

Bvar average = sales.Count() / sales.Sum();

Cvar average = sales.Average();

Dvar average = sales.Sum();

Step-by-Step Solution

Solution:

Step 1: Understand built-in Average()
C# provides Average() to calculate mean directly.
Step 2: Identify why others are wrong
var average = sales.Sum / sales.Count(); misses parentheses on Sum (syntax error). var average = sales.Count() / sales.Sum(); reverses the division. var average = sales.Sum(); only sums.
Final Answer:
var average = sales.Average(); -> Option C
Quick Check:
Use Average() for mean value [OK]

Quick Trick: Use Average() method for easy mean calculation [OK]

Common Mistakes:

MISTAKES

Dividing count by sum
Using Sum() alone
Missing parentheses on Sum

Master "LINQ Fundamentals" in C Sharp (C#)

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More C Sharp (C#) Quizzes