Find the numbers which are in the ratio 5:2:4 such that the sum of the first and the second added to the difference of the third and the second is 18?
Select.
A) 4,3,22
B) 4,4,22
C) 10,4,8
D) 9,6,12
E) 9,2,23
Let the numbers be a, b and c.   a:b:c = 5:2:4   Given, (a + b) + (c - b) = 21   =&gt; a + c = 21   =&gt; 5x + 4x = 18 =&gt; x = 2   a, b, c are 5x, 2x, 4x   a, b, c are 10, 4, 8.   Answer:10,4,8
<result>C</result>
Find the numbers which are in the ratio 5:2:4 such that the sum of the first and the second added to the difference of the third and the second is 18?