Answer:
<em>Assuming person A and person B are part of the 7 people</em>, there are 10 ways the 7 people can line up if A needs to be first or last and B needs to be in the middle.
Step-by-step explanation:
There are 2 places for A (first, last) and 5 places for B (anywhere but first or last). 2 x 5 = 10.
5+4=9 es uno 4+5=9 es Otro 9-5=4 es Otro 9-4=5
80 possible 2 digit passwords
5040 possible 4 digit PIN's with no repeats
can't see 7 to answer pls tell
