Which percent change represents a percent increase? A. Original amount = 978 New amount = 118 Percent change = 87% B. Original amount =574 New amount = 678 Percent change = 18% C. Original amount = 1,055 New amount = 1,000 Percent change = 5% D. Original amount = 1,254 New amount= 1,045 Percent change = 17%

option B

Step-by-step explanation:

Increase indicated when new amount is greater than original amount

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.