SOLUTION: here is the problem that I am having trouble with One of the students in your class was absent the day of the test. The teacher announced that the class average for the 24 stu

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: here is the problem that I am having trouble with One of the students in your class was absent the day of the test. The teacher announced that the class average for the 24 stu      Log On


   

Question 798454: here is the problem that I am having trouble with

One of the students in your class was absent the day of the test. The teacher announced that the class average for the 24 students who took the test was 75%. After the other student returned and took the test, the teacher announced that the class average had increased to 76%. Explain how you can calculate what the absentee student got on her test.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
An average = ( sum of the data ) / ( the number of samples )
Before the other student returns, let +s+
= the sum of the test scores
+75+=+s+%2F+24+
+s+=+75%2A24+
+s+=+1800+
-----------
Let +x+ = the score that the returning student got
+76+=+%28+1800+%2B+x+%29+%2F+25+
+25%2A76+=+1800+%2B+x+
+x+=+1900+-+1800+
+x+=+100+
The absentee student got 100%