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OpenStudy (anonymous):
this question is logical:suppose in a semester examination 600 student sat for math, 300 physics while 173 student sat for both what is the number of student that sat for just a course
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OpenStudy (anonymous):
since the 173 sat in for both math and physics, you want to subtract 173 from both the math and physics students. 600-173 = 427 just math 300-173 = 127 just physics add 427 and 127, and you get the students who took only one test: 554 students
OpenStudy (chaise):
|dw:1315626899254:dw| M = Maths B = Both P = Physics
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