rajlal wrote:
At Didymus Corporation there are just two classes of employees: Silver and Gold. The average salary of Gold is $56000 higher than that of silver employees. If there are 120 silver employees and 160 gold employees then the average salary for the company is higher than the average salary for the silver BY ?
A) 8000
B) 15000
C) 25000
D) 32000
E) 36000
you can use weighted average method too...
........gold.............silver
average..x............x+56000...
weights... 160.............120..
so company'S AVERAGE = \(x+56000*\frac{120}{120+160}=x+56000*\frac{120}{280}=x+200*120=x+24000\)
difference in silver and company's average = (x+56000)-(x+24000)=x+56000-x-24000=32000