A superconducting "bullet" train is researched and tested on a track. The steepest section of the track has a rise of 1830 meters for a horizontal distance of 6100 meters. What is the grade of this section of track? 1830 meters 6100 meters​

I DONY KNI'

LJGJHDHDFSSRWAWADVHBJN

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

i think asking google will you get the answer to that question