Binomial Theorem


To receive grade ‘A’ in a course, one must obtain an average of 85 marks or more in four examinations (each of 100 marks). If Keshav’s marks in first three examinations are 82, 80, 91. Find the minimum marks that Keshav must obtain in the fourth examination to get grade ‘A’ in the course.


Solution not provided.
Ans. 87

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