Multiple choice

The average score of a student in four subjects is 75. If the student obtains 80 marks in the fifth subject, then the new average will be

  1. 76

  2. 77.5

  3. 80.2

  4. 85

  5. 82.5
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A Correct answer
Explanation

Sum of 4 subjects = 4 * 75 = 300. New sum = 300 + 80 = 380. New average = 380 / 5 = 76.

AI explanation

The total score in the four subjects is 4 times 75, which equals 300 marks. Adding the 80 marks obtained in the fifth subject gives a new total of 380 marks. Dividing this new total by 5 subjects gives the new average of 76.

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