Twenty-one students at a school have an allergy to peanuts, shellfish, or both.
fourteen stu...
Mathematics, 27.08.2019 15:30, diontna29
Twenty-one students at a school have an allergy to peanuts, shellfish, or both.
fourteen students at the school are allergic to peanuts.
twelve students at the school are allergic to shellfish.
how many of the students are allergic to both peanuts and shellfish?
a 12
b 7
c 5
d 2
Answers: 1
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