If x, y, and z are positive integers, and 3x = 5y = 6z, then the least possible value of x + y + z is	Select the correct option:
A) 21
B) 28
C) 37
D) 42
E) 60
Take LCM of 3,5 and 6 = 30   Now 3x = 30 =&gt; x =10   5y = 30 =&gt; y = 6   6z = 30 =&gt; z =5   10+6+5= 
<gadget id="calculator">10+6+5</gadget>
<output>21</output>
21.   Option 21.
<result>A</result>
If x, y, and z are positive integers, and 3x = 5y = 6z, then the least possible value of x + y + z is