Debbie is borrowing 3 books from her friend who has a collection of 45 books. which of the following expressions represents the number of ways debbie can choose a group of 3 books?
a. p(45, 3)
b. c(45, 3)
b.45!

b.C(45, 3)

Step-by-step explanation:

Given: Debbie is borrowing 3 books from her friend who has a collection of 45 books.

Therefore,  the number of ways Debbie can choose a group of 3 books will be equal to the number of combinations of selecting 3 books from 45 books.

i.e. The number of ways Debbie can choose a group of 3 books=

333333333333333333333333333333

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.