Question 805234
The average mark on a test is 80. If the two lowest scores of 34 and 48 are not counted, the remaining scores would average 83. How many students are in the algebra class?
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Let "x" be the number of students in the class.
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Equations:
(sum of scores of all the students) = 80x
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(sum of scores -(34+48)) = 83(x-2)
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S = 80x
S - 82 = 83x-166
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80x = 83x+82-166
3x = 166-82 = 84
x = 28 (# of students in the class)
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Cheers,
Stan H.
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