Tutors Answer Your Questions about Average (FREE)
Question 575101: I am grading an exam. The first part of the exam is worth 60% of the total grade. The second part is worth 40%. How do I set up a grading system for each part of the exam, and then calculate the grade for the exam as a whole?
dancw98@hotmail.com
Click here to see answer by KMST(1868)  |
Question 576018: Show me how one arrive at the answer 77 for this problem. A total of 50 juniors and seniors were given a mathematics test. The 35 juniors attained and average score of 80 while the 15 seniors attained an average of 70. What was the average score for all 50 students who took the test? I know the answer is 77. I'm just not sure how to arrive at this answer. Is there a algebra formula that one can use to solve this problem and if so would you show me how to solve it using the algebra formula? My e-mail is zippor21@gmail.com
Click here to see answer by ankor@dixie-net.com(15639)  |
Question 576499: 2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?
A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hours and 10 minutes
E. 4 hours and 33 minutes
Click here to see answer by solver91311(16872)  |
Question 576505: Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?
A. $280.90
B. $287
C. $292.50
D. $306
E. $333.89
Click here to see answer by josmiceli(9662)  |
Question 577913: A teacher has two math classes. In one class there are 80 students and the average grade on a test was 30. In her other class there are 40 students and the average grade on the same test is 50. What is the average grade of all her students?
Click here to see answer by dfrazzetto(277)  |
Question 577913: A teacher has two math classes. In one class there are 80 students and the average grade on a test was 30. In her other class there are 40 students and the average grade on the same test is 50. What is the average grade of all her students?
Click here to see answer by stanbon(57261) |
Question 580348: I have been working on this math problem for the past 2 hours and is having a difficult time with it. Can anyone please help me.
p(x)= -.1x^2+50x-300, where x is the number of items sold, x>0.
Please and thank you
Click here to see answer by dfrazzetto(277)  |
Question 583427: Frank scored 7 points in the first half and 9 points in the second half of the basketball game. The total points he scored represented of the total points his team scored.
How many total points did his team score?
Click here to see answer by dfrazzetto(277)  |
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