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Rekha obtained 89, 90, 95, 90, 80 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What is her average marks?88.885909193

Question

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Solution

1. Break Down the Problem

To find Rekha's average marks, we need to:

  1. Sum up all the marks she obtained.
  2. Divide the total marks by the number of subjects.

2. Relevant Concepts

The formula for calculating the average is given by: Average=Total MarksNumber of Subjects \text{Average} = \frac{\text{Total Marks}}{\text{Number of Subjects}}

3. Analysis and Detail

  1. Calculate Total Marks:

    • Marks obtained in each subject:
      • English: 89
      • Mathematics: 90
      • Physics: 95
      • Chemistry: 90
      • Biology: 80
    • Total Marks = 89+90+95+90+80 89 + 90 + 95 + 90 + 80

    Total Marks=89+90+95+90+80=444 \text{Total Marks} = 89 + 90 + 95 + 90 + 80 = 444

  2. Number of Subjects:

    • There are 5 subjects.
  3. Calculate Average:

    • Average Marks = 4445 \frac{444}{5}

    Average Marks=88.8 \text{Average Marks} = 88.8

4. Verify and Summarize

The calculations have been verified. Adding up the individual marks yields a total of 444, and dividing this by 5 confirms that the average is indeed 88.8.

Final Answer

Rekha's average marks are 88.8 \mathbf{88.8} .

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