There are 60 new houses being built in a neighborhood. last month, 2/3 of them were sold. this month, 1/4 of the remaining houses were sold. how many houses are left to be sold.

15

Step-by-step explanation:

2/3 of 60 = 40 houses sold.

60 - 40 = 20

That leaves 20 houses left.

1/4 of 20 is 5 houses sold.

That leaves 15 houses left.

answer: ask

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.