Ahmad had $1000$ shares of a company with a face value of $₹50$ and paying  $10\%$ dividend. He sold some of these shares at a discount of  $10\%$ and invested the proceeds in $₹20$ shares at a premium of  $50\%$ and paying  $10\%$ dividend. If the changes in his income is $₹200$, then find the number of shares sold by Ahmad.

Mr. Gupta has a choice to invest in $₹10$ shares of two firms at $₹13$ or at $₹16$. If the first firm pays $5\%$ dividend and the second firm pays  $6\%$ dividend per annum, then find how much in all, does Mr. Gupta If he invests equally in both the firms and the difference between the returns from them is $₹30$?

Salman Buys $50$ Shares of Face Value $₹100$ Available at $₹132$. What is his Investment?

Salman buys $50$ Shares of Face Value $₹100$ Available at $₹132$. If the dividend is $7.5\%$ what will be the annual income?

Salman Buys $50$ Shares of Face Value $₹100$ Available at $₹132$. If he wants to increase his annual income by$₹150$, then how many extra shares should he buy. 

Bhavana invested $₹20,000$ and $₹25,000$ in buying shares of 'Bharati Telecom' and 'Satyam Infoways' which later declared dividend of $10\% \& 12.5\%$  respectively. After collecting the dividends Bhavana sells all her shares at a loss of $4\% \& 5\%$ respectively on her investments. Find her total earning.