Question

To get an A in a course, a student needs to average 90% or better on four tests. The first three tests are worth 100 points each and the fourth is worth 200 points. If the student scores 85, 95, and 82, respectively on the first three tests; what must they score (at a minimum) on the fourth test to get an A in the class

Answer 1

Answer :

The total points are 300 + 200 = 500.
90% of 500 = 450 points

The 3 scores are: 85, 95,and 82 which sum to 262.

450 - 262 = 188

You must scores 188 out of 200 on the fourth test to get an A.

Your scores are 85, 95, and 82

To get an average of 90 on all four tests, your formula needs to be:

85+95+82 + x = 90*4
Combine like terms and simplify to get:
262 + x = 360
Subtract 263 from both sides of the equation to get:

x = 360 - 262= 98

You need to get a 98 on the last test.

Then you would get the following:

85+95+82 +98 = 360

360/4 = 90% overall average on the 4 tests.

Hope this will be helpful. Thanks and God Bless you :)