If m, n, and o are positive numbers such that (m/(m+n))(10) + (n/(m+n))(20)=o and if m<n which of the following could be the value of o? Select: A) 10 B) 12 C) 15 D) 18 E) 36
The answer is D. For any positive m and n, o is a number between 10 and 20. Since m &lt; n, weight of 10 is inferior of weight of 20 -&gt; o is &gt; 15 -&gt; 18 is the answer.
<result>D</result>
If m, n, and o are positive numbers such that (m/(m+n))(10) + (n/(m+n))(20)=o and if m<n which of the following could be the value of o?