This recipe makes 7 portions of chocolate mousse. Cali has 900 g chocolate, 50 eggs, 100 mL of lemon juice and 250 g of sugar.
Cali makes 21 portions of mousse by following this recipe.
How much of each ingredient will she have left?

Recipe: Serves 7
200 g chocolate
12 eggs
15 mL lemon juice
50 g sugar
g chocolate
eggs
mL lemon juice
g sugar

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?