Asked by Colette
In a word problem 80 offered maths,60 offered English,50 offered physics, 20 offered both maths and English, 15 offered both English and physics, 10 offered the three. How many students sat for the examination given that none did both physics and maths?
Answers
Answered by
mathhelper
Contradiction:
you said 10 took all three, then you said none did both physics and maths.
you said 10 took all three, then you said none did both physics and maths.
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