[Solved] What is the output of this C# code?var numbers = new List<int> { 3, 6, 9, 12 }; var count = numbers.Count(); var sum = numbers.Sum(); var average = numbers.Average(); Console.WriteLine($"Count:... | C Sharp (C#)

C Sharp (C#) - LINQ Fundamentals

What is the output of this C# code?

var numbers = new List<int> { 3, 6, 9, 12 };
var count = numbers.Count();
var sum = numbers.Sum();
var average = numbers.Average();
Console.WriteLine($"Count: {count}, Sum: {sum}, Average: {average}");

ACount: 4, Sum: 30, Average: 7.5

BCount: 4, Sum: 30, Average: 9

CCount: 3, Sum: 30, Average: 10

DCount: 4, Sum: 24, Average: 6

Step-by-Step Solution

Solution:

Step 1: Calculate Count()
The list has 4 elements: 3, 6, 9, 12, so count is 4.
Step 2: Calculate Sum() and Average()
Sum is 3+6+9+12 = 30. Average is 30 divided by 4 = 7.5.
Final Answer:
Count: 4, Sum: 30, Average: 7.5 -> Option A
Quick Check:
Count=4, Sum=30, Average=7.5 [OK]

Quick Trick: Sum and Average depend on list values, Count is number of items [OK]

Common Mistakes:

MISTAKES

Miscounting elements
Incorrect sum calculation
Wrong average formula

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What is the output of this C# code?

Step 1: Calculate Count()

Step 2: Calculate Sum() and Average()

Final Answer:

Quick Check:

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