400hundred students read in a class.among them 60%passed in science,70%passed in mathematics,65%passed in English and 55%passed in all subjects.how many students failed in all subjects?
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no of students write test in the class = 400
no of students passed in science = 60
no of students passed in maths = 70
no of students english = 65
no of students passed in social = 55
therefore no of students failed in the class = 400 - (60+70+65+55)
= 400- 350
= 50
no of students failed in the class = 50
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