Simple interest produces interest only over the initial amount.
So every year the interest will be $1000 * 5 / 100 = $50.
That is, after 3 years 3 * $50 = $ 150.
Simple interest does not take into account the reduction of the principal but calculates the interest over the same initial amount, in this case $1000.
So, the answer is $150, which is the result of $50 times 3.
