Compound X contains elements A and B at an approximate ratio, by weight, of 2:10. Approximately how many grams of element B are there in 108 grams of compound X? Choose the correct choice from the following options.
A) 90 B) 162 C) 250 D) 270 E) 322
total number of fractions =2+10= 
<gadget id="calculator">2+10</gadget>
<output>12</output>
12   element B constitutes=10 out of 12 parts of X   So in 108 gms of X have 108*10/12= 
<gadget id="calculator">108*10/12</gadget>
<output>90</output>
90 gms of B   and  108-90= 
<gadget id="calculator"> 108-90</gadget>
<output>18</output>
18 gms of A.   cross check:- 90/B= 18/90 =2/10 (as given)   90ns 90
<result>A</result>
Compound X contains elements A and B at an approximate ratio, by weight, of 2:10. Approximately how many grams of element B are there in 108 grams of compound X?