Pls help need it pls

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

Indicate the formula for the following conditions: p^c(n,r)=

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?