Mathematics, 26.11.2019 07:31 Ruby2480

Out of 30 students in college 15 takes art courses, 8 takes biology courses and 6 takes chemistry. it is also known that 3 students take all the 3 courses. show that 7 or more students taken none of the course?

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Out of 30 students in college 15 takes art courses, 8 takes biology courses and 6 takes chemistry. i...

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