A college has raised 75% of the amount it needs for a new building by receiving an average donation of Rs. 600 from the people already solicited. The people already solicited represent 60% of the people, the college will ask for donations. If the college is to raise exactly the amount needed for the new building, what should be the average donation from the remaining people be solicited? Pick one
A) 300	B) 250	C) 400	D) 500	E) None
Solution: Let the number of people be x who has been asked for the donations.   People already solicited = 60% of x = 0.6x   Remaining people = 40% of x = 0.4x   Amount collected from the people solicited,   = 600 *0.6= 
<gadget id="calculator">600 *0.6</gadget>
<output>360</output>
360x   360x= 75% of the amount collected.   Remaining amount = 25% = 120x   Thus,   Average donations from remaining people,   = 120x /0.4x = 300.   300nswer: Option 300120  /0.4= 
<gadget id="calculator">120  /0.4</gadget>
<output>300</output>
300.   300nswer: Option 300
<result>A</result>
A college has raised 75% of the amount it needs for a new building by receiving an average donation of Rs. 600 from the people already solicited. The people already solicited represent 60% of the people, the college will ask for donations. If the college is to raise exactly the amount needed for the new building, what should be the average donation from the remaining people be solicited?