Probability of Compound Events
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Of the 30 students in the sixth period math class, 8 are also in the same fourth period science class. Which can be used to
determine the probability that if three students are chosen at random from the math class to do a group project, the first
student chosen to be in the group is in the fourth period science class but the other two are not?

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?