In a class of 39 students, 4 were absent. 20 % of the rest didn't complete their homework. How many students have completed their homework?
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total student=39
Absent=4
present student=39-4=35
student didn't complete their homework=
20% of 35
20/100×35=7
student complete their homework=35-7=28
Answer
28 students complete their homework
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