An Airbus A380 has 1 first-class section, 1 business-class section
and 4 economy-class sections.
The first-class section has 14 seats.
are being used.

Are more than half the seats
on the plane being used?
You must show your working.
The business-class section has 64 seats.

are being used.
Each economy-class section has 108 seats.
. in each section are being used.

Note: Following your working, your final line

must clearly say YES or NO.

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.

you already gave the answer

step-by-step explanation:

probably .5

i can on others if necessary.