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Total number of students = 100 Number of students who play Rugby = 55% of 100 = 55 Number of students who play Basketball = 30% of 100 = 30 Number of students who play both the games = 15% of 100 = 15 Number of students who play neither rugby nor basketball = 100 – (55 + 30 – 15) = 100 – 70 = 30
The shape of our Milky Way galaxy is
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