Jenny's average on 4 exams is 80. Assuming she cannot earn more than 100 on any exam. What is the least she can earn on her 5th exam and still have a chance for an average of 84 after seven exams?
Created: 6 years ago |
Updated: 3 years ago
best des
Total number of jenny after 4 exam = 80× 4 = 320
Total not of jenny after 7 exam = 84×7 = 588
Total no of jenny 5th, 6th, and 7th, exam = 588 - 320 = 268
She can earn highest 200 marks on 6th and 7th exam.
She must earned at least ( 268 - 200) = 68 marks on 5th exam.
Md Azizur Rahman
Founder of Satt
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