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19
To find the mean of the numbers 15, 18, and 24, you first add them together: 15 + 18 + 24 = 57. Then, divide the sum by the number of values, which is 3: 57 ÷ 3 = 19. Therefore, the mean of the numbers is 19.
The LCM is: 360
5/6, 10/12, 15/18, 20/24
(7+11)/2 + 15 = 24 7+11 = 18/2 = 9 + 15 = 24