An amount of money was invested at 10% a year. Five times that amount was invested at 15%. How much was invested at 15% if the total annual return was $1,615?  Choose the most appropriate option: A) 9500 B) 1000 C) 10500 D) 11000 E) 11500
Let x and 5x be the amounts invested as 10% and 15% respectively.   Annual return for x = .1x   Annual return for 5x = .75x   Total return = .85x = 1615   x = 1900   So amount invested for 15% = 9500.   9500NSWER:9500
<result>A</result>
An amount of money was invested at 10% a year. Five times that amount was invested at 15%. How much was invested at 15% if the total annual return was $1,615?