Foundation
Mathematics Foundation
Measure of Central Tendency
Solution of Linear Equation
Question
The mean of 7, 9, 11, 13, x ,21 is 13. Then the value of x is.
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Solution
The mean of 7, 9,11, 13, x, 21 is 13
then 13 =
⇒ 78 = 61 + x
⇒ x = 78 – 61 = 17