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Mathematics, 15.04.2021 14:00 sirinapadeangel
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On Monday a group of students took a test and the average ( arithmetic mean ) score was exactly 80.4. A student who was absent on Monday took the same test on Tuesday and scored 90. The average age test score was then exactly 81. How many students took the test on Monday?
A) 14
B) 15
C) 16
D) 17
E) 18
With steps please
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