From 50 students taking examination in mathematics physics and chemistry
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From 50 students taking examination in mathematics, physics and chemistry , 37 passed maths ,24 physics and 43 chemistry .Atmost 19 passed maths and physics ,atmost 29 passed maths and chemistry and atmost 20 passed physics and chemistry .The largest possible no. that could have passed all three examination is
a -11. b-12. c-13. d-14.