What is not the basic ingredient of a valid trust?

Vinod had taken a housing loan of Rs. 15 Lakh disbursed on 1st April 2006. They are presently paying an EMI of Rs. 17,285 at the end of every month beginning from the month of disbursement. The loan is at fixed rate of interest of 11.25% p.a. (reducing monthly balance basis) with tenure of 15 years. He wants to know what amount is eligible for deductible u/s 24 of Income Tax for housing loan repayments in computation of his Income tax liability for AY 2011-12.

You have Rs.500,000 available to invest. The risk-free rate as well as your borrowing rate is 8%. The return on the risky portfolio is 16%. If you wish to earn a 22% return, you should __________.

The probability distribution of the rate of return on ABC stock is given below:

What is the standard deviation of return?

Mr. Reddy is 58 years old and has just retired from his company,and have a total retirement benefits of Rs.
29,37,500/-. His life expectancy is 75 years. He has a dream to take a world-trip after 2 years from now with an estimated current price of Rs. 4,00,000/-. He has finalized a flat of Rs. 15,00,000/- for immediate purchase.
Calculate how long his corpus will run if his post retirement living expenses in the beginning of every year is Rs. 1,35,000/- considering inflation @ 4% and rate of return is 6% p.a.?