SOLUTION: A student needs at least 80% of all points on the tests in a class to get a B. There are three 100-point tests and a 250-point final. The student's test scores are 72%, 85%, and 78

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Question 833245: A student needs at least 80% of all points on the tests in a class to get a B. There are three 100-point tests and a 250-point final. The student's test scores are 72%, 85%, and 78% for the 100 point tests. What is the least score the student can make on the final and still get a B?
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
How many points are there total? (3*100)+250 = 550
So far, he has 72 + 85 + 78, or 235
He needs 0.80 * 550 for a B, or 440 points
440 - 235 = 205 points on the final to get a B
Percentage-wise, he needs 205/250, or 0.82 <<--
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Note that there are a lot of different ways to solve a problem like this. This way is easiest for me. Others may have different solutions that also work.