The arithmetic means of 10, 15, X ,20, 30 is 20. What is the value of x
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Answer:
x = 25
Explanation:
Sum of all observations = 75 + x
Total number of observations = 5
Given that,
Arithmetic mean = 20
Arithmetic mean = Sum of all observations/Total number of observations
=> 20 = 75+x/5
=> 100 = 75+x
=> x = 100 - 75
=> x = 25
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