Let's analyze the provided table which shows the percentage of marks obtained by 7 students across 5 different subjects. The maximum marks for each subject is 100, so the marks directly represent the percentage.

The question asks us to find the percentage of students who scored equal to or more than 60% in every subject. This means a student must have obtained marks of 60 or higher in Subject 1 AND Subject 2 AND Subject 3 AND Subject 4 AND Subject 5 to be included in our count.

Step-by-Step Analysis of Student Performance

Let's go through each student one by one and check if they meet the condition of scoring 60% or more in all five subjects.

• Student 1: Marks are 40, 45, 55, 65, 70. Subject 1 (40), Subject 2 (45), and Subject 3 (55) are less than 60. So, Student 1 does not meet the criteria.
• Student 2: Marks are 60, 70, 75, 65, 60. All marks (60, 70, 75, 65, 60) are equal to or greater than 60. So, Student 2 meets the criteria.
• Student 3: Marks are 70, 74, 64, 68, 72. All marks (70, 74, 64, 68, 72) are equal to or greater than 60. So, Student 3 meets the criteria.
• Student 4: Marks are 50, 75, 57, 65, 62. Subject 1 (50) and Subject 3 (57) are less than 60. So, Student 4 does not meet the criteria.
• Student 5: Marks are 61, 66, 72, 58, 60. Subject 4 (58) is less than 60. So, Student 5 does not meet the criteria.
• Student 6: Marks are 70, 65, 68, 56, 78. Subject 4 (56) is less than 60. So, Student 6 does not meet the criteria.
• Student 7: Marks are 65, 45, 70, 52, 58. Subject 2 (45), Subject 4 (52), and Subject 5 (58) are less than 60. So, Student 7 does not meet the criteria.

Counting Students Meeting the Percentage Criteria

Based on the analysis above, the students who scored 60% or more in every subject are:

• Student 2
• Student 3

Thus, a total of 2 students meet the required percentage criteria.

Calculating the Percentage of Students

We need to find the percentage of these students out of the total number of students. There are 7 students in total.

The number of students who scored $\ge 60\%$ in every subject is 2.

The total number of students is 7.

The percentage is calculated using the formula:

$\text{Percentage} = \left( \frac{\text{Number of students meeting criteria}}{\text{Total number of students}} \right) \times 100$

Substituting the values:

$\text{Percentage} = \left( \frac{2}{7} \right) \times 100$

$\text{Percentage} \approx 0.285714 \times 100$

$\text{Percentage} \approx 28.57\%$

Final Answer Calculation

The percentage of students having equal or more than 60% in every subject is approximately 28.57%.

Revision Table: Student Performance Summary

Here is a summary showing whether each student met the criteria:

Additional Information: Analyzing Percentage Data

Analyzing percentage data in tables is a common task in data interpretation. When asked for a percentage of entities (like students) meeting specific criteria across multiple categories (like subjects), it's important to check if the criteria must be met in ALL categories or just ANY category. In this case, the key phrase "in every subject" means the condition ($\ge 60\%$) must hold true for all 5 subjects simultaneously for a student to be counted.

Calculations involving percentages from tables often require:

• Identifying the total population (total students).
• Identifying the subset of the population that meets the specific condition.
• Using the percentage formula: $\frac{\text{Part}}{\text{Whole}} \times 100$.