The base of an isosceles triangle is 16 cm and the arm is 20 cm. Calculate the perimeter of the triangle formed by the midpoints of the triangle.

Jane is cooking beans and rice for dinner tonight. she has 4 cans of black beans, 6 cans of red beans, and 3 cans of garbanzo beans in her cupboard. if she grabs a can of beans without looking at the label, what is the probability of her making black beans and rice for dinner?