SOLUTION: The average (arithmetic mean) number of students in 3 economics classes at a certain college is 24. If the total number of students in 2 of the classes combined is 38, how many stu

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Question 274823: The average (arithmetic mean) number of students in 3 economics classes at a certain college is 24. If the total number of students in 2 of the classes combined is 38, how many students are in the remaining class?
A 19 b 24 c 31 d 34

Answer by dabanfield(803) About Me  (Show Source):
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The average (arithmetic mean) number of students in 3 economics classes at a certain college is 24. If the total number of students in 2 of the classes combined is 38, how many students are in the remaining class?
A 19 b 24 c 31 d 34
Let x be the number of students in the remaining class. Then we have:
(38 + x)/3 = 24
Solve for x.