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Question
The average (arithmetic mean) of x and y is 20. If x = 5 what is the average of x. y and z?
15
12.5
10
25
ANSWER : 1
Descrption
<p style="margin-left:0px;"><strong><u>The question lacks information.</u></strong><br><br>Let's start by finding the value of "y" using the information that the average of x and y is 20 and that x is equal to 5:</p><p style="margin-left:0px;">Average of x and y = (x + y) / 2 = 20</p><p style="margin-left:0px;">Since x = 5:</p><p style="margin-left:0px;">(5 + y) / 2 = 20</p><p style="margin-left:0px;">Now, we can solve for "y":</p><p style="margin-left:0px;">5 + y = 2 * 20 5 + y = 40</p><p style="margin-left:0px;">Subtract 5 from both sides:</p><p style="margin-left:0px;">y = 40 - 5 y = 35</p><p style="margin-left:0px;">So, we have found that y = 35.</p><p style="margin-left:0px;">Now, to find the average of x, y, and z, we need to know the value of "z." If "z" is not given, we cannot determine the average.</p>
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