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Question: The computer science department had 29 students in the year 2002. If 15 of these students failed, then how many students graduated?


A ) 23
B ) 5
C ) 44
D ) 14

Steps to derive

1 Let s be the number of students, who graduated.

 [Write an equation.]
2 s + 15 = 29

 [Subtract 15 from each side.]
3 s + 15 - 15 = 29 - 15

 [Simplify.]
4 s = 14

5 The number of students who graduated is 14.



Hence the right answer is Option D

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