Lakshmi invested some money in 25% stock at 500.If Usha wants to invest in an equally good 50% stock ,he must purchase a stock worth of :  Options
A) Rs. 1000 B) Rs. 1200 C) Rs. 1300 D) Rs. 1400 E) Rs. 1500
Solution   For an income of Rs. 25, investment = Rs. 500   For an income of Rs. 50, investment = Rs.(500/25x50) = Rs. 1000   Rs. 1000nswer Rs. 1000
<result>A</result>
Lakshmi invested some money in 25% stock at 500.If Usha wants to invest in an equally good 50% stock ,he must purchase a stock worth of :