Q22 of 51 Page 6

To receive Grade ‘A’ in a course, one must obtain an average of 90 marks or more in five examinations (each of 100 marks). If Sunita’s marks in first four examination are 87, 92, 94 and 95, find minimum marks that Sunita must obtain in fifth examination to get Grade ‘A’ in the course.


Let Sunita obtain x marks in her fifth examination.

Then,

⇒ 368 + x ≥ 450 ⇒ x ≥ 82.

Thus, Sunita must obtain a minimum of 82 marks to get Grade ‘A’ in this course.

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