Joe pays $4.20 per carton for fresh eggs from the farmers’ market. If x represents the number of egg cartons and y is the total cost, which of the following representations contains an error?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer