Praveen gets 40 marks out of 50 in Computer Science, 70 out of 100 in Manufacturing science and 142 out of 150 in proffessional communication. The marks of Praveen in percent in all the three subjects is :

Options

A. `84%`
B. `76%`
C. `71%`
D. `60%`

Answer

To find Praveen's percentage marks in each subject, we can follow these steps:

### Step 1: Calculate the percentage for each subject.

1. **Computer Science**:
- Marks obtained: 40
- Total marks: 50
- Percentage = (Marks obtained / Total marks) × 100
- Percentage = (40 / 50) × 100 = 80%

2. **Manufacturing Science**:
- Marks obtained: 70
- Total marks: 100
- Percentage = (Marks obtained / Total marks) × 100
- Percentage = (70 / 100) × 100 = 70%

3. **Professional Communication**:
- Marks obtained: 142
- Total marks: 150
- Percentage = (Marks obtained / Total marks) × 100
- Percentage = (142 / 150) × 100 = 94.67% (approximately)

### Step 2: Calculate the overall percentage across all subjects.

1. **Total Marks Obtained**:
- Total marks obtained = Marks in Computer Science + Marks in Manufacturing Science + Marks in Professional Communication
- Total marks obtained = 40 + 70 + 142 = 252

2. **Total Marks Possible**:
- Total marks possible = Total marks in Computer Science + Total marks in Manufacturing Science + Total marks in Professional Communication
- Total marks possible = 50 + 100 + 150 = 300

3. **Overall Percentage**:
- Overall Percentage = (Total Marks Obtained / Total Marks Possible) × 100
- Overall Percentage = (252 / 300) × 100 = 84%

### Final Answer:
Praveen's overall percentage in all three subjects is **84%**.

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