Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 tests she had taken, however the class had taken 5 tests total. She scored a 94, 67, 83 and 93. If Sarah ended up with a grade of 90, what did she get on the 5th and final test?

Answer 1

She has a total of 337 points.

0.9 * 500 = 450

She'd need a score of 113 to get a 90% average. As Steve said about 3 months ago, there must be a typo in the problem.

http://www.jiskha.com/display.cgi?id=1427422976

Answer 2

(94+67+83+93+x)/5 = 90
x + 337 = 450
x = 113

mmmmh, looks like this question is bogus.
She cannot get a 90 average.

Answer 3

That makes four of us to find this problem is faulty. MathMate came to the same conclusion about three weeks ago.

Jay -- please let your teacher know that this problem has an error.

Answer 4

I will let her know first thing Monday morning. Thanks

Answer 5

Thank you. And you're welcome.