A jar contains 5 blue, 3 red, and 7 green balls. What is the approximate probability of drawing a blue or red ball first drawn?

Step-by-step explanation:

Total balls = 7 + 3 + 5 = 15

Probability of blue ball = 5/ 15 = 1/3

Probability of red ball = 3/15 = 1/5

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.

4.

step-by-step explanation:

it have the same area.brainliest