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OpenStudy (anonymous):
220 students were asked if they liked chocolate or vanilla ice cream. 140 said they liked chocolate and 120 said they liked vanilla. How many students liked both chocolate and vanilla? 260 100 80 40
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OpenStudy (anonymous):
Use this formula\[n(A n B)=n(A)+n(B)-n(A \cup B)\]
OpenStudy (anonymous):
wut
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