These marbles are placed in a bag and two of them are randomly drawn. What is the probability of drawing two yellow marbles if the first one is put back in the bag before the second draw?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.