A list of measurements in increasing order is 4, 5, 6, 8, 15 and x. If the median of these measurements is 2/3 times their arithmetic mean, what is the value of x? Answers.
A) 20  B) 22  C) 25  D) 28  E) 30
The median is (6+8)/2= 
<gadget id="calculator">(6+8)/2</gadget>
<output>7</output>
7   The mean is (4+5+6+8+15+x)/6= (38+x)/6   (38+x) /6 * 2/3 = 7   x = 63-38= 
<gadget id="calculator">63-38</gadget>
<output>25</output>
25   The answer is 25.
<result>C</result>
A list of measurements in increasing order is 4, 5, 6, 8, 15 and x. If the median of these measurements is 2/3 times their arithmetic mean, what is the value of x?