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Mathematics

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in an examination of 140 students, 80 students passed mathematics,65 passed physics, 75 passed chemistry, 33 passed mathematics and physics while 30 passed mathematics and chemistry only, if 15 students passed all three courses and 91 students passed at least two courses , how many students failed all courses?

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shresthaneera54 shresthaneera54

Today at 8:08 AM

Answer:

only I think 10 failed all courses

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