Giving a test to a group of students, the grades and gender are summarized below A B C Total
Male 4 11 15 30
Female 12 19 16 47
Total 16 30 31 77

If one student is chosen at random,

Find the probability that the student was male AND got a "A".

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

Which ordered pair is a solution of the equation? 2x+3y=10

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?