It has been reported that 65% of college students prefer e-textbooks over the traditional textbook. a local agency randomly selected 320 college students and discovered that 215 of them share the same view. test the validity of the reports at a=0.01 by using data collected by the local agency.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236