What is the mean of the following set of numbers?
30, 28, 8, 26

23

Step-by-step explanation:

To calculate mean, add numbers and divide by amount of numbers

30 + 28 + 8 + 26 = 92

92/4 = 23

23

to find the mean add al the numbers together then divide it by 4 because that how many numbers are there

answer: ouch. thats difficult

step-by-step explanation:

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.