please check my answer. each test is worth 100 points. the following test have been taken and earned 91, 90, 93. for a total of 360 points to earn an A, what grade should be made on the final test to earn an A

Question

please check my answer. each test is worth 100 points. the following test have been taken and earned 91, 90, 93. for a total of 360 points to earn an A, what grade should be made on the final test to earn an A 
my answer is 91.5

Ms. Sue · Answer

The three test scores add up to 274 points. 360 - 274 = 86 The last test must have a score of at least 86 in order to have a total of 360 points.