Helen is plan a trip for three classes at her son's school school say that classes on trips must have one adult for every six children one class has 24 children one has 26 children and the third has 28 children each class has one teacher how many other adults are needed for the trip

24 + 26 + 28 = 78, so 78 students in total

78 ÷ 6 = 13.

13 - 3 = 10

282 6/7 cm^2

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.