Gina loaned Gerry $300 at an interest rate of 10 percent a year. How much interest will Gina get if Gerry pays Gina after 6 months?(1 point) $

The interest rate is 10% per year, which means it is 10/100 = 0.10 per year.

So, the interest for 6 months is 0.10 x 6/12 = 0.05.
Therefore, Gina will get $300 x 0.05 = <<300*0.05=15>>15 as interest. Answer: \boxed{15}.