in a class, 20 opted for physics,17for maths,5for both and
10 for other subjects.the class contains how many students ?
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Answer Posted / waran
p-physics=20
m-maths=17
A-both(phy&maths)=5
o-other=10
p+m+a+o=20+17+5+10=52
total students will be 52
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