Liam works at a zoo he was looking at some data showing the masses of the five African elephants the main mass of the elephants was 3800 kg in the median was 3600 kg the heaviest elephant named Omar was recorded at 6000 kg Liam then found out that Omar’s mass was written down incorrectly and that Omar actually has a mass of 7,000 kg I will increasing Omar’s mass affect the mean and median

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.

your answer would be 12

there still no table

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !