SOLUTION: You are taking a course that has four tests. The first three tests are worth 100 points each, and the fourth test is worth 200 points. To get an A in the course, your must have an
Question 1019729: You are taking a course that has four tests. The first three tests are worth 100 points each, and the fourth test is worth 200 points. To get an A in the course, your must have an average of at last 90% on the four tests. Your scores on the first three tests were 87, 92, and 84. What must you score on the fourth test to get an A in the course? Answer by solver91311(24713) (Show Source):
In order to have an average of 90, your total points for the 4 tests must be 5 times 90, or 450 points. The reason you multiply by 5 is that the last test is worth double the first three, so it is the same as having 5 tests. You know the total points of the first three tests by simply adding them. Then subtract from 450 to know the score needed on the last one.
John
My calculator said it, I believe it, that settles it
