It takes machine M, x hours to manufacture a deck of cards that machine N can manufacture in y hours. If machine M operates alone for z hours and is then joined by machine N until 40 decks are finished, for how long will the two machines operate simultaneously?
The graph below shows the average daily circulation (in thousands) of two newspapers (A and B) for ten years. Find the average daily circulation of A in the year the when combined average daily circulation was minimum.
Hamish and Georgia each have a bag that contains one ball each of the colors pink, green, orange, black and grey. Hamish randomly selects a ball from his bag and puts it in Georgia's bag. Then Georgia randomly selects a ball from her bag and puts it in Hamish's bag. What is the probability that after this the contents of the bag are the same as before?