Mrs. Merrill wants to buy donuts for her homeroom
students, as long as all the
students return their info
cards. She has 21 kids in her
homeroom. She knows that
she can by a box of 12 donuts
for $3.99 at the store. She
wants each kid to get 2
donuts. How much do you
expect her to pay for donuts?

there is 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.

its an acute right triangle

step-by-step explanation: