Suppose approximately 75% of all marketing personnel are extroverts, whereas about 70% of all computer programmers are introverts. (For each answer, enter a number. Round your answers to three decimal places.)

---- At least 5 from marketing departments are extroverts

---- All from marketing departments are extroverts

---------- None from computer programmers are introverts

Step-by-step explanation:

See comment for complete question

The question is an illustration of binomial probability where

--- marketing personnel

--- proportion that are extroverts

Using the complement rule, we have:

So, we have:

So, we have:

Recall that:

--- approximated

--- marketing personnel

--- proportion that are extroverts

So, we have:

---------- computer programmers

--- proportion that are introverts

So, we have:

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153