Determine the average rate of change in median age per year from 1930 to 1960.
a -0.5 years of age per year
b. 20 years of age per year
c. -0.05 years of age per year
d. +0.05 years of age per year

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?