Answer:
Step-by-step explanation:
<u>Let the format be:</u>
- LLDD- where L stands for letter and D- digit
For each L we have 26 (English alphabet) and for each D we have 10 options.
<u>Number of possible accounts:</u>
(4x28)+64
112+64
176
Rounded to the nearest ten it would be 180
Answer:
-2.25
Step-by-step explanation:
We have that the mean (m) is equal to 500, the standard deviation (sd) 20
They ask us for P (x <455)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / sd
We have all these values, replacing we have:
z = (455 - 500) / (20)
z = -2.25
