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 to be solicited? Choose the correct choice from the following options.
A) Rs 300 B) Rs 250 C) Rs 400 D) Rs 500 E) None of these
Explanation :   Let x be the total no. of people the college will ask for donation.   The people already solicited 0.6x.   Amount raised from the people solicited 600 x 0.6x = 360x.   Now, 360 constitutes 75% of the amount.   Hence, the remaining 25% = 120x.   Hence, the average donation from remaining people   = 120x / 0.4x = 300.   Rs 300nswer : Rs 300120  / 0.4= 
<gadget id="calculator">120  / 0.4</gadget>
<output>300</output>
300.   Rs 300nswer : Rs 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 to be solicited?