: During blood donation camp in a school, 60% of the total students donated blood. If the number of students who did not donate blood was 480, find the total number of students in the school.
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Answer:
let x be total students
so total students donated blood + students not donated blood = 100%
60+ 480/x*100=100
60+48000/x=100
60x+48000=100x
100x-60x=48000
40x=48000
x=48000/40
x=1200
total students = 1200
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