Answer:
464 $
Step-by-step explanation:
It would be 6.0x4 because the square is 6.0 on each side
Since she has seven key the probability that the first one will open the door is

if it takes three attempts to open the door,the probability is

if the three attempts would not work
then the probability that the fourth attempt will open the door is

hope this helps
Answer:
Logically, the answer is either 12 or 42