Mathematics

Mathematics, 25.06.2019 06:30, homeschool0123

In a class of 30 students. everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. eight hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 24 hands raised. how many students have piercings both on their ears and their noses?

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Mathematics, 22.06.2019 10:40, carterhoward

In a class of 50 students, everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. seven hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 46 hands raised. how many students have piercings both on their ears and their noses?

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Mathematics, 08.07.2019 21:20, stef76

In a class of 40 students, everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. eight hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 35 hands raised. how many students have piercings both on their ears and their noses?

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Social Studies, 03.08.2019 22:30, mooreadrian41235

In a class of 40 students, everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. eight hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 37 hands raised. how many students have piercings both on their ears and their noses?

Answers: 1

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Mathematics, 01.11.2019 02:31, surfer89

In a class of 40 students, everyone has either a pierced nose or a pierced ear. the professor asks everyone with a pierced nose to raise his or her hand. seven hands go up. then the professor asked everyone with a pierced ear to do likewise. this time there are 36 hands raised. how many students have piercings both on their ears and their noses? i would think the obvious answer could be 7 but not necessarily. can anyone me with this formula?

Answers: 2

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