A student has 70%, 80%,79%,and 69% on the first 5 tests . There is one test left and he wants to get at least an 80% in the course. is it possible ? Explain.
You gave grades for 4 tests not five.
I will assume total of 5
(70 + 80 + 79 + 69 + x)/5 = 80
(298 + x) = 80 * 5
x = 80 * 5 - 298
x = 102
I think this kid is in trouble :(
typo ?
I count only 4 marks for the first 5 tests
Once you found your error, replace A with your 5th test and solve for x
(A+70+80+79+69+x)/6 ≥ 80
To determine if it is possible for the student to achieve at least an 80% in the course, we need to consider the average score and the weight of each test. If each test is assigned an equal weight in calculating the final grade, the average can be obtained by adding up all the test scores and dividing by the total number of tests.
Let's calculate the average score for the student's first four tests:
(70 + 80 + 79 + 69) / 4 = 298 / 4 = 74.5%
Currently, the student has an average score of 74.5%. Now, let's assume the final test carries the same weight as the previous tests. To determine the minimum score the student needs to achieve an 80% average, we can set up the following equation:
(74.5 + x) / 5 = 80
Solving for x, the score the student needs to achieve on the final test, we have:
74.5 + x = 400
x = 400 - 74.5
x = 325.5
Therefore, the student would need to score a 325.5% on the final test to achieve an 80% average for the course, which is mathematically not possible.