MathematicsTo receive Grade ‘A’ in the course, are must obtain an average of 90 marks or mere in five examinations (each of 100 marks). Sunita’s marks in the first your examinations are 87, 92, 94 and 95. Find the minimum marks that sunita must obtain in the fifth examination to get grade ‘A’ in the course?Class: 10

To receive Grade ‘A’ in the course, are must obtain an average of 90 marks or mere in five examinations (each of 100 marks). Sunita’s marks in the first your examinations are 87, 92, 94 and 95. Find the minimum marks that sunita must obtain in the fifth examination to get grade ‘A’ in the course?

Class: 10

A
80
B
82
C
81
D
63

Solution:

Let us assume ‘x’ as the marks obtained by sunita in the fifth examination.
Now, to receive grade 'A’ as the course sunita must obtain an average of 90 marks or move in the five examinations.
⇒ 368 + x ≥ 450
x ≥ 82
∴ sunita must obtain greater than as equal to 82 marks in the fifth examination.

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