What is the probability that a person thinks that "Made America" ads boost sales and uses social media online?

If a U.S. adult in the 18-34 years category is randomly selected

a. What is the probability that a person thinks that "Made America" ads boost sales and uses social media online?
b. What is the probability that the person thinks that "Made in America" ads boot sales given that the person does not use social media online?

Question 2:

According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bill are normally distributed with a standard deviation of $11.35

a. What is the probability that a randomly selected monthly cell phone bill is more than $100?
b. What is the probability that a randomly selected monthly cell phone bill is between $60 and $83?
c. What is the probability that a randomly selected monthly cell phone bill is between $80 and $90?
d. What is the probability that a randomly selected monthly cell phone bill is no more than $55?

Question 3:

A Travel Weekly International Air Transport Association survey asked business travelers about the purpose of their most recent business trip. 19% responded that it was for an internal company visit. Suppose 950 business travelers are randomly selected.

a. What is the probability that more than 25% of the business travelers say that the reason for their most recent trip was an internal company visit?

b. What is the probability that between 15% and 20% of the business travelers say that the reason for their most recent business trip was an internal company visit?

c. What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?