Question 358543
<pre><font size = 3 color = "indigo"><b>
Hi,
Lt x represent the % score on the last test.
student needs at least 80% of all points on the tests in a class to get a B
{{{(72 + 85 + 78 + x)/4 = 80}}}
235 + x = 320
x = 320-235 = 85
x = 85%  Student needs an 85%  on the last test
250 Question Test
.85*250 = 212.5
Students needs a 'score' of at least 213 on last test