A regular tetrahedron has three white faces and one red face. It is rolled four times and
the colour of the bottom face is noted. Find
the most likely number of times that the
red face will end downwards. Calculate the
probability of this value occurring.

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

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?

Graph the following system of linear inequalities. identify at least two points in the solution: y < 5 - 2x | x + 5y > -7