You just multiple how many types of vehicles and the property of the vehicle (standard, custom etc.) to get 12 ways
3n<50
n<50/3
The variable N represents a whole number.
For what values of n will the sum of n+3 be less than 50?
Answer:
The sample proportion of printers used in small business is:

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

Where:
is the critical value at 0.05 significance level




Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)