In a class of 40, students do either French or Spanish or both, but must do at least one. If 18 students do both subjects and 30 students do French, how many students do Spanish only?
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Answer:
10
Step-by-step explanation:
Total students=40
No. of students doing French = 30
No. of students that both do=18
No. of students that do French only=30-18=12
No. of students that do Both and Spanish= 40 -12 = 28
Spanish + Both = 28
Spanish only= 28-18=10
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