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Evaluate the mean of temperatures:
Example:
Given the subsequent temperature readings,
573, 573, 574, 574, 574, 574, 575, 575, 575, 575, 575, 576, 576, 576, 578
Solution:
Conclude the frequency of each reading.
Then calculate the mean,
x' = 2(573) + 4(574) + 5(575) + 3(576) + 1(578)/15
x' = 8623/15
x' = 574.9
In figure, the incircle of triangle ABC touches the sides BC, CA, and AB at D, E, and F respectively. Show that AF+BD+CE=AE+BF+CD= 1/2 (perimeter of triangle ABC), Ans:
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