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Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What percent of those who passed the first test also passed the second test?
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Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What percent of those who passed the first test also passed the second test?

User Sachin Aggarwal
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So 30 out of the 45 who passed the first test also passed the second test.
As a percent this is


(30)/(45)=(2)/(3)=66\tfrac{2}{3}\%
Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of-example-1
User Pttsky
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