Plz help will give brainliest
and all my points

1. 5.6%

2. 15%

3. 300 seats

4. 2.3%

Step-by-step explanation:

1. Percent error is A-E/E*100

A is actual and e is expected

376-356/356= 0.05618*100= 5.6%

2. 17-20/20=-0.15*100= 15%

3. This time we have to solve for the actual

x-250/250*100=20

x=300 seats

4. 342-350/350=-0.0228571429*100= 2.3%

the circle one

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.