In an experiment involving a treatment applied to 6 test subjects, researchers plan to use a simple random sample of 6 subjects selected from a pool of 8 availa

Question

Choices are ;

 

 210
 
250
 
28
 
7776

Answer 1

The number of ways to select 6 from 8 (when order does not matter) is:

 

8 Choose 6 = 8! / 6!(8-6)! = 8*7 / 2 = 28

 

 

J.T.