At the local convenience store william and sarah are getting snacks for the friend's william buys 3 soft drinks and 2 hot dogs at a cost of $7.70 while sarah buys 2 soft drinks and 1 hot doh at cost of 4.55 what are the two variables in this system represent?

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?