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e) During the rapid diagnostic test for coronavirus among some people in urban area, 900 of them were found negative result and it was 3/4 of number of tested people. Rest of the people were found to be suspected COVID-19 and their throat swab was tested. From the tested swab, 3/20 them were found infected.

(i) Find the tested number of people

(ii) Find the number of suspected people

(iii) Find the number of infected people of COVID-19.​