Question

Out of three exams, Ravi had scored 70 and 75 marks in two examinations. A student can be placed in Grade A is the average score of three exams will be at least 73 and at most 80. Ravi is placed in Grade A. What is the maximum mark that he could have scored in the third examinations ?
A. 95
B. 90
C. 74
D. 83

Answer 1

Correct Answer - A
(i) Frame two different inequations and solve.
(ii) Let he scored x marks in the third exam.
(iii) Use ` 73 le (75 + 70 + x)/(3) le 80` and solve for x.