Mathematics, 22.09.2019 01:50 TH3L0N3W0LF

At a seminar, 2/5 of the audience were students. 3/10 of them were retirees. the rest were professionals. there were 18 more students than professionals. how many people were in the audience?

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At a seminar, 2/5 of the audience were students. 3/10 of them were retirees. the rest were professio...

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