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If the mean of 10 observations is 20 and that of another 15 observations is 16. Find the mean of all 25 observations?

Asked by Baby 05/11/2016 Last Modified 25/11/2016

1 Answer

Learn Mathematics +2 Class IX-X Tuition Measures of Central Tendency

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n(s)=30 LetA be the event Of getting non divisible by 3 A = 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29. n(A) = 20 P(A) = 20/30 = 2/3 Let B be the event of getting prime number...

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Trigonometry, the elegant branch of mathematics, holds the keys to unlocking the mysteries of angles, triangles, and periodic phenomena. From ancient astronomers navigating the stars to modern engineers...

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