Divide ₹ 50,760 into two parts such that if one part is invested in 8%, ₹ 100 shares at 8% discount and the other in 9%, ₹ 100 shares at 8% premium, the annual incomes from both the investments are equal.

Which is the better investment:

10%, ₹ 100 shares at ₹ 120 or 8%, ₹ 100 shares at ₹ 72?

Ashish bought 4,500, ₹ 10 shares paying 12% per annum. He sold them when the price rose to ₹ 23 and invested proceeds in ₹ 25 shares paying 10% per annum at ₹ 18. Find the change in his annual income.

Amit owns 1500, ₹ 25 shares of a company which declares a dividend of 14%. He sells the shares at ₹ 40 each and invests the proceeds in 8%, ₹ 100 shares at ₹ 80. What is the change in his annual dividend income ?