An employee at a gym wants to select a random sample of gym members for a survey about their exercise habits.

select yes or no to tell whether each method results in a random sample of the population.

No, no, yes, no

Step-by-step explanation:

The first one is not random.  He is sampling only the earliest gym goers.

The second one is not random.  He is sampling only from one zip code.

The third one is random.  He is using a random number generator.

The fourth one is not random.  He is sampling only volunteers.

because 1.2 isnt half of 6 duh