15.2.37 One dimensional random variables and their characteristics

Problem: The probability of a stock rising by \( 3 \% \) in one working day is equal to 0,1 , the probability of rising by \( 0,1 \% \) is equal to 0,6 , and the probability of decrease by \( 1 \% \) is equal to 0,3 . Find the expected value of the change of the stock in 100 working days, taking into account that the initial stock is 1000 dollars, and the relative price changes for different working days are independent random variables.