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Florence made 87 on her midterm exam in psychology The average of her midterm and her final must be at least 90 to get an A in the course Let s represent herscore on the final?
(87 + s)/2 = 90 87 + s = 180 s = 93
Juan scored 5 points higher on his midterm and 13 points higher on his final than he did on his first exam If his mean average score was 90 what was his score on the first exam?
---- ASSUMPTIONS: First Exam = X Midterm Exam = X + 5 Final Exam = X + 13 Mean Average Score for the 3 exams above = 90 ---- SOLUTION: 90 = [X + (X + 5) + (X + 13)] / 3 90 * 3 = [X + (X + 5) + (X + 13)] 270 = 3X + 18 270 - 18 = 3X 252 = 3X 252 / 3 = X 84 = X Conclusion: Juan scored 84 points on his first exam. (See below for proof) ---- PROOF: First Exam = X = 84 Midterm Exam = X + 5 = 89 Final Exam = X + 13 = 97 Mean Average of 90 points --> [84 + 89 + 97] / 3 = 270 / 3 = 90
If you have an overall mark of 67 percent your final exam is worth 40 percent What mark do you have to get on your final exam to come out of the class with a 70 percent as your mark?
You need at least a 75% on your exam.
8th std final exam sciencequestion paper?
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A student writes 2 exams and gets 83 percent for the first and 90 percent for the second The second exam counts for 66 percent of the overall result What is his final percentage?
Answer:87.62 %Solution:given: Second exam weight = 66%then: overall weight = 100% this is conclusion from the question.the first exam weight = 100-66= 34%Final result = weighted average =(first exam result * weight of first exam + second exam reuslt * weight of second exam) / Overall weight= (83*34+90*66)/100=(2822+5940)/100= 8762/100= 87.62%---More information about weighted mean:http://en.wikipedia.org/wiki/Weighted_mean
