What is the standard deviation of the number of trainees that ...

[codyclark]

What is the standard deviation of the number of trainees that will still be employed at the end of nine months?
 
  A) 0.540
  B) 0.240
  C) 0.735
  D) 0.490

Question 2

The purchasing agent for a municipality has contracted with a local car dealer to purchase four cars. The dealer has 25 cars on his lot; 10 red, 7 blue, 6 white, and 2 purple.
 
  If the purchasing agent has no control over the colors he receives, what is the probability that he receives at least one of the purple cars?A) 0.33
  B) 0.30
  C) 0.36
  D) 0.39

[wilsonbho]

Answer to Question 1

C

Answer to Question 2

B