Category: Precalculus homework help

A class has 20 boys and 15 girls. The teacher randomly selects 4 students to go to the board to solve the exercises. The probability that the 4 selected students are both male and female is 

20 math precalc questions (log chapter) not too difficult mixed with some word problems and graphing. Need in the next 5 hours. 

20 math precalc questions (log chapter) not too difficult mixed with some word problems and graphing. Need in the next 5 hours.