Out of 8000 candidates,60 percent were boys. If 80 percent of the boys and 90 percent of girls passed the exam, find the no.of candidates who failed
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number of boys = 60*8000/100= 4800
number of girls = 3200
no of boy fail = 20*4800/100= 960
no of girls fail = 10*3200/100=320
total number of student fail = 1280
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