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Answer:
the mean of the data set is 15, i hope this helped you :))
Triangle CED = 47°
Triangle BEC = 28°
360 - 28 - 47 - 112 = 173
The answer = 173°
LCM = 5 × 3 × 3 × 7 × 2 × 2 × 5
LCM = 6300
<u>Hence, the LCM of 315 , 420 , 525 is 6300</u>