In a box there is a number of toys, out of which 1/6 are dolls, 1/12 are balls, and the remaining 18 are plastic cubes. How many dolls are in the box?	Select:  A) 2  B) 6  C) 4  D) 16  E) 3
Let x be the number of toys.   x(1/6+1/12)=3x/12=x/4.   x-x/4=3x/4 is the number of cubes   Thus, 3x/4=18. From here, x=24.   The number of dolls is   1/6*24= 
<gadget id="calculator">  1/6*24</gadget>
<output>4</output>
4.   Answer 4 4.
<result>C</result>
In a box there is a number of toys, out of which 1/6 are dolls, 1/12 are balls, and the remaining 18 are plastic cubes. How many dolls are in the box?