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The table attached shows the result of survey of 100 students who responded with “For” or “Against” or “Not sure” when asked about the Debate choice of the Topic A and Topic B. What was the number of students who responded “For” for both Topics?
(1) The number of students who did not respond “For” for either Topic was 40.
(2) The number of students who responded “Against” for both Topics was 20.
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