On a multiple choice test with 6 questions, each question has ...

[sammy]

On a multiple choice test with 6 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the random variable X, the number of correct answers.
 
  A) 2 B) 3 C) 4.5 D) 1.5

Question 2

A sample consists of every 45th worker from a group of 4000 workers. What sampling technique was used?
 
  A) simple random
  B) convenience
  C) cluster
  D) stratified
  E) systematic

[ApricotDream]

Answer to Question 1

D

Answer to Question 2

E

[sammy]

Excellent

[dreamfighter72]

Gracias!