In a bag with plastic shapes, there are 6 triangles, 4 circles, and 5 squares. What is the probability of pulling out two triangles if the first shape is replaced before the second shape is pulled out? Write your answer as a simplified fraction.(1 point)
There are 6 triangles out of a total of 6 + 4 + 5 = <<6+4+5=15>>15 shapes in the bag.
The probability of pulling out a triangle on the first draw is 6/15.
Since the shape is replaced before the second draw, the probability of pulling out a triangle again is also 6/15.
The probability of pulling out two triangles is (6/15)(6/15) = 36/225 = 4/25.
Answer: \boxed{\frac{4}{25}}.