Three numbers are in the ratio 3 : 4 : 5 and their average is 36. The largest number is :
Choose one:
A) 30
B) 98
C) 27
D) 21
E) 45
45xplanation:   Let the numbers be 3x, 4x and 5x, Then, (3x + 4x + 5x ) / 3 = 36   =&gt; 12x = 36*3   =&gt; x = 9   Largest number 5x = 5*9= 
<gadget id="calculator">5*9</gadget>
<output>45</output>
45   Answer:45
<result>E</result>
Three numbers are in the ratio 3 : 4 : 5 and their average is 36. The largest number is :