Logic Building
# Take number of subjects
n = int(input("Enter number of subjects: "))
# Take marks and weights
total_weighted = 0
total_weight = 0
for i in range(n):
marks = float(input(f"Subject {i+1} marks: "))
weight = float(input(f"Subject {i+1} weight: "))
total_weighted += marks * weight
total_weight += weight
# Calculate weighted average
average = total_weighted / total_weight
# Assign grade
if average >= 90:
grade = "A+"
elif average >= 80:
grade = "A"
elif average >= 70:
grade = "B"
elif average >= 60:
grade = "C"
else:
grade = "F"
print(f"Weighted average: {average:.2f}")
print(f"Grade: {grade}")Output
Enter number of subjects: 3 Subject 1 marks: 85 Subject 1 weight: 2 Subject 2 marks: 90 Subject 2 weight: 3 Subject 3 marks: 75 Subject 3 weight: 1 Weighted average: 85.83 Grade: A
Calculate weighted average and assign grade.
Key Concepts:
- Weighted sum = sum(marks * weight)
- Weighted average = weighted sum / total weight
- Assign grade based on average