Probability is favorable outcome to total possibilities.
So, any probability will be x/80
There are 36 seventh graders, and 22 girls in eighth grade (40-18=22). 36+22=58
The probability of drawing either a seventh grader or a girl is 58/80, or 72.5%
The answer would be 4x2 -6y4
x3 y3
There is no graph. Maybe put it next time