A box contain 74 brass watchers, 86 steel watchers and 40 aluminum watchers. Three watchers are drawn at random from the box without replacement. (a) determine the probabilities that are no aluminum watchers are drawn at random from the box. (b) find the probability that there are two brass watchers and either are steel or an aluminum watchers when three are drawn at random without replacement.

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?