Kamal sold Rs.9000 worth 7% stock at 80 and invested the proceeds in 15% stock at 120. Find the change in his income?

A person sells a 20% stock of face value Rs.5000 at a premium of 62% with the money obtained he buys a 15% stock at a discount of 22% what is the change in his income.(Brokerage 2%)

Equal amounts are invested in 12% stock at 95 (brokerage). If 12% stock brought at Rs.120 more by way of dividend income than the other, find the amount invested in each stock?

Rani sold Rs.8000 worth 7% stock at 96 and invested the amount realised in the shares of FV Rs.100 os a 10% stock by which her income increased by Rs.80. Find the purchase price of 10% stock.

A company has a total capital of Rs.5,00,000 divide into 1000 preference shares of 6% dividend with par value RS.100 each and 4000 ordinary shares of per value Rs.100 each. The company delares an annual dividend of Rs.40,000. Find the dividend received by Sundar having 100 preference shares and 200 ordinary shares.