Answer:
3*5^6
Step-by-step explanation:

a. 9:00 AM is the 60 minute mark:

b. 8:15 and 8:30 AM are the 15 and 30 minute marks, respectively. The probability of arriving at some point between them is

c. The probability of arriving on any given day before 8:40 AM (the 40 minute mark) is

The probability of doing so for at least 2 of 5 days is

i.e. you're virtually guaranteed to arrive within the first 40 minutes at least twice.
d. Integrate the PDF to obtain the CDF:

Then the desired probability is

Common Stock :
→Common stock is the most common type of stock that is issued by companies.
→ Have voting privileges, whereas holders of preferred stock may not.
→ Most common stock gives owner one vote per number of shares owned.
Preferred Stock :
→ Preferred stock is generally considered less volatile than common stock.
→ Preferred stockholders generally do not have voting rights.
Both common stock and preferred stock have their advantages.
When considering which type may be suitable for you, it is important to assess your financial situation, time frame, and investment goals.