Question

What is an algorithm that will a accept the score 30 student in a class that calculate and print the average mark

Answer 1

To write an algorithm that accepts scores from 30 students, calculates the average mark, and then prints it, you can follow these steps:

1. Initialize a variable to hold the sum of all scores.
2. Use a loop to gather scores from the 30 students.
3. Inside the loop, validate the input to ensure that it is within the acceptable range (if desired, e.g., 0 to 100).
4. Add each valid score to the sum.
5. After collecting all scores, calculate the average by dividing the total sum by 30.
6. Print the average score.

Below is a structured pseudocode representation of the algorithm:

### Pseudocode

```
BEGIN
// Step 1: Initialize variables
totalSum = 0
numberOfStudents = 30

// Step 2: Loop through 30 students to get their scores
FOR studentIndex FROM 1 TO numberOfStudents DO
PRINT "Enter the score for student", studentIndex, ": "
READ score

// Step 3: Validate the score
WHILE score < 0 OR score > 100 DO
PRINT "Invalid score. Please enter a score between 0 and 100."
READ score
END WHILE

// Step 4: Add score to the total sum
totalSum = totalSum + score
END FOR

// Step 5: Calculate average
averageScore = totalSum / numberOfStudents

// Step 6: Print the average score
PRINT "The average score of the class is:", averageScore
END
```

### Implementation in Python (Example)

Here's a simple implementation of the above algorithm using Python:

```python
def calculate_average_marks():
total_sum = 0
number_of_students = 30

for student_index in range(1, number_of_students + 1):
score = float(input(f"Enter the score for student {student_index}: "))

# Validate the input score
while score < 0 or score > 100:
print("Invalid score. Please enter a score between 0 and 100.")
score = float(input(f"Enter the score for student {student_index}: "))

total_sum += score

# Calculate average
average_score = total_sum / number_of_students

# Print the average score
print(f"The average score of the class is: {average_score}")

# Call the function to execute
calculate_average_marks()
```

### Notes:
- The pseudocode and Python example assumes that scores are expected to be between 0 and 100. Adjust this as needed.
- You may want to handle other types of input validation depending on the context of usage (e.g., ensuring numerical input, handling exceptions for non-numeric entries, etc.).