The students in a hostel were asked whether they had a TV set or a computer in their rooms. The result showed that 650 students had a TV set, 150 students did not have a TV set,175 students had a computer and 50 students had neither a TV set nor a computer. Find the number of students who live in the hostel .
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650 + 175 + 50 − 150 = 720 so their are 720 students in hostel
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