What is the perimeter of a triangle with sides measuring 5 cm, 8 cm, and 10 cm?
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What is the average number of books read by 30 students in a month, if the data shows the following: 10 students read 2 books, 15 students read 4 books, and 5 students read 6 books?
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What is the probability of getting exactly 3 heads when tossing a fair coin 10 times?