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Source: Economist GMAT
All of the students who took a certain test answered the two first questions on the test. If 60% of the students answered the first question on the test correctly, and 40% of the students answered the second question on the test correctly, then what percent of the students answered neither of the two questions correctly?
1) 20% of the students answered both the first and the second questions on the test correctly
2) Two thirds of the students who did not answer the second question on the test correctly answered the first question on the test correctly
The OA is D
All of the students who took a certain test answered the two first questions on the test. If 60% of the students answered the first question on the test correctly, and 40% of the students answered the second question on the test correctly, then what percent of the students answered neither of the two questions correctly?
1) 20% of the students answered both the first and the second questions on the test correctly
2) Two thirds of the students who did not answer the second question on the test correctly answered the first question on the test correctly
The OA is D
