A person borrows 20000 for 6 years at 8% p.a. simple interest. He immediately lends it to another person at 9 % p.a. for 6 years. Find his gain in the transaction per year.  Choose the correct answer:
A) 200  B) 250  C) 210  D) 190  E) 180

Rationale: gain in 6 years = [ ( 20000 ã — 9 ã — 6 / 100 ) â ˆ ’ ( 20000 ã — 6 ã — 8 / 100 ) ] = ( 10800 â € “ 9600 ) = 1200 â ˆ ´ gain in 6 year = ( 1200 / 6 ) = 200 answer a
Answer: A